DOWESTON Technical & Selection Center
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Humidity and temperature transmitters: 50 selection, application and maintenance questions
50 shared questions for Humidity and temperature transmitters, covering selection, delivery, maintenance, common questions and evidence-based brand comparisons, with verification actions, limits and sources.
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Shared guidance for this product family. Confirm the complete model and application; family-level guidance is not evidence of a particular product specification or approval.
General principles do not replace technical confirmation of a specific model. Verify performance, approvals and replacement against the complete order code and actual conditions.
1What does the Humidity and temperature transmitters principle establish, and what does it not establish?
Temperature-humidity systems measure temperature and water-vapor state; RH is temperature-dependent and condensation can invalidate measurement. The principle explains signal generation; it does not establish the range, accuracy, materials or approvals of every model. Review the physical principle and the application limits separately.
Verification: Confirm "RH or dew-point objective" and assess "RH change is not necessarily a moisture-content change" against the actual application. Record the complete model and document revision used.
Application boundary:RH change is not necessarily a moisture-content change
2Is the required result measured directly or calculated from other inputs?
Define the quantity to be accepted before selecting a display unit. Temperature-humidity systems measure temperature and water-vapor state; RH is temperature-dependent and condensation can invalidate measurement. For "RH or dew-point objective", document output definitions and conversion or compensation conditions; displaying a value does not make it a direct measurement under all conditions.
Verification: Document the process objective, units and reference conditions. Check "RH change is not necessarily a moisture-content change" and list separate inputs and acceptance methods for calculated results.
Application boundary:RH change is not necessarily a moisture-content change
3Which application information is needed before requesting a quotation?
Prepare at least these five input groups: RH or dew-point objective; Temperature, pressure and condensation; Flow, sampling position and heat sources; Contaminants and filtration; Calibration conditions and uncertainty. Mark unknown items for confirmation instead of substituting a normal point or an assumed default for all conditions.
Verification: Have process, instrumentation and purchasing roles agree the inputs, particularly "Temperature, pressure and condensation". Resolve missing evidence before requesting application confirmation.
Application boundary:RH change is not necessarily a moisture-content change
4How should the range be chosen rather than copied from a nominal equipment rating?
Select the range from actual operating conditions and permissible error, then check extremes and installation constraints. For this family: RH change is not necessarily a moisture-content change Nominal size or maximum equipment rating need not equal the useful measuring interval.
Verification: List minimum, normal, maximum and abnormal conditions. Check "Flow, sampling position and heat sources" against the documented performance envelope.
Application boundary:RH change is not necessarily a moisture-content change
5Can a larger turndown claim or display rescaling fix poor low-end performance?
No. Low-end usability depends on the principle, available signal and error mechanisms. Ordinary probes are not guaranteed valid during condensation More display digits, software scaling or a stated turndown cannot remove the original noise or installation error.
Verification: Obtain error definitions and limits at the actual low operating point. Use "Does a dirty filter only slow response → It can also retain moisture or carry contamination and alter readings. → Avoid local heating of the probe and record Contaminants and filtration" to investigate bias instead of comparing only percent-of-full-scale values.
Application boundary:Ordinary probes are not guaranteed valid during condensation
6How should compatibility with the measured object and materials be established?
Use the complete measured object and actual exposure, rather than a material name alone. Contaminants and filtration Avoid this family-specific misuse: Ordinary probes are not guaranteed valid during condensation For non-wetted equipment, assess loads, target materials, signals and environmental compatibility instead.
Verification: List the actual contact or loading parts, seals, insulation and cleaning conditions. Have the responsible parties assess "Heated-probe RH conversion needs a valid ambient temperature".
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
7Why must abnormal and environmental conditions be listed separately from normal operation?
Normal measurement, temporary excursions and survival limits are different requirements. Heated-probe RH conversion needs a valid ambient temperature Start-up, cleaning, impacts, power interruption or abnormal environments can determine the necessary construction and protection.
Verification: Complete the worst-case conditions using "Calibration conditions and uncertainty" and check "A salt solution alone does not ensure traceability". Separate continuous operating limits from temporary limits in the specification.
Application boundary:A salt solution alone does not ensure traceability
8Can the published instrument accuracy be used as the installed system accuracy?
Not without assessment. Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. The installed system also includes object, mounting, signal conversion, environmental and reference effects. Derived results additionally depend on the relevant input uncertainties.
Verification: Agree actual test points, installation conditions and the acceptance reference. Check "Avoid local heating of the probe" and document the system error or uncertainty basis.
Application boundary:Ordinary probes are not guaranteed valid during condensation
9How should response time, filtering and a stable display be balanced?
A stable indication and fast change detection involve a trade-off; filtering cannot repair incorrect installation or real process variation. Why can adjacent probes disagree → Temperature, airflow, radiation and response differences can prevent equilibrium. → Use representative sampling and airflow and record Flow, sampling position and heat sources Review the complete chain when fast response matters, not merely the display refresh rate.
Verification: Define the shortest relevant event and acceptable delay. Check "Assess filter protection and response together" and verify local output, display and receiving-system response using a controlled change.
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
10Which typical applications fit, and which require a specific engineering review?
Typical contexts include: Environmental chamber; Industrial air monitoring; Drying-process evaluation. Similar application labels do not establish equivalent conditions. In particular, assess "A salt solution alone does not ensure traceability" before relying on another installation as proof.
Verification: Select the nearest application and compare "RH or dew-point objective" and "Calibration conditions and uncertainty". Obtain written confirmation where published application limits are exceeded.
Application boundary:A salt solution alone does not ensure traceability
11How should a complete order code be defined without unspecified standard options?
Translate required functions, performance and physical interfaces into verifiable options. RH or dew-point objective; Temperature, pressure and condensation. Options affecting suitability or supply scope should be explicit; terms such as standard or same as existing are insufficient.
Verification: Check the complete order code and selection sheet, especially "Flow, sampling position and heat sources". List accessories, documents, calibration and delivery boundaries separately.
Application boundary:RH change is not necessarily a moisture-content change
12Which mounting and mechanical layout checks belong before ordering?
Avoid local heating of the probe The installation drawing must match the available space and process or mechanical structure. Access for fitting and servicing should be established before delivery.
Verification: Review a dimensioned, oriented site drawing. Use "Contaminants and filtration" and "Heated-probe RH conversion needs a valid ambient temperature" to confirm connections, support, removal access and safe isolation.
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
13How can supporting infrastructure prevent an instrument that fits but cannot be used?
Allow thermal equilibrium with the gas Supporting conditions are part of the measurement system. Matching mechanical connections or signal names alone do not establish power, I/O, grounding or configuration compatibility.
Verification: Confirm "Avoid local heating of the probe" and "Verify output, failure state and receiving-system compatibility" against actual terminals, loops and receiving-system settings.
Application boundary:Ordinary probes are not guaranteed valid during condensation
14What is a sensible commissioning sequence before changing correction factors?
Check identity, installation and basic conditions first, then status, output and process response. Assess filter protection and response together Preserve original evidence for unexplained anomalies instead of concealing them with zero or factor adjustments.
Verification: Record factory settings and initial status. Investigate "What can cause a persistently high RH reading → Condensation, contamination and cold spots must be excluded before adjustment. → Assess filter protection and response together and record Temperature, pressure and condensation" step by step and change parameters only after identifying the cause and using an authorised procedure.
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
15Do identical output units or interface names establish connection compatibility?
No. Establish the represented object and reference conditions: RH or dew-point objective. Electrical equipment also needs loop type, scaling, failure behaviour and protocol details checked. Mechanical indicators require clear boundaries between indication and remote-transmission accessories.
Verification: Check the receiving-system variable against "RH or dew-point objective" and verify limits, units and abnormal states with the actual equipment. Record wiring, configuration and end-to-end checks against "Allow thermal equilibrium with the gas".
Application boundary:Ordinary probes are not guaranteed valid during condensation
16What should a calibration report contain to be relevant to the application?
Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. The report should identify the delivered instrument, measured quantity, conditions, method and results. A general conformity certificate does not establish performance for every option or operating condition.
Verification: Check serial number, points, units, reference equipment and traceability. Compare "Temperature, pressure and condensation" with the calibrated conditions and agree separate acceptance where they differ.
Application boundary:Ordinary probes are not guaranteed valid during condensation
17How can delivery and site acceptance use reproducible pass criteria?
Use representative sampling and airflow Agree criteria before testing, including range, conditions, error definition and treatment of anomalies. Similar-looking readings or an unsuitable portable reference are not sufficient acceptance evidence.
Verification: Choose an appropriate reference using "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment.". Record "RH or dew-point objective" and test conditions; investigate "Does a dirty filter only slow response → It can also retain moisture or carry contamination and alter readings. → Avoid local heating of the probe and record Contaminants and filtration" before deciding on rework or recalibration.
Application boundary:Ordinary probes are not guaranteed valid during condensation
18What belongs in the quotation and agreement for a non-standard application?
Define why the standard supply is insufficient, the required verification and the responsible parties. A salt solution alone does not ensure traceability; A salt solution alone does not ensure traceability. Additional materials, construction, documents or tests depend on actual requirements.
Verification: Attach "Calibration conditions and uncertainty" and the deviations. Obtain technical confirmation, additional charges, delivery conditions and acceptance methods; unknown requirements must not be assumed satisfied.
Application boundary:A salt solution alone does not ensure traceability
19Where should investigation start when there is no valid reading or output?
What can cause a persistently high RH reading → Condensation, contamination and cold spots must be excluded before adjustment. → Assess filter protection and response together and record Temperature, pressure and condensation Distinguish the actual measured condition from device-state and readout or transmission faults. Do not immediately interpret missing data as sensor failure or a zero process value.
Verification: Under appropriate safe isolation, check "Allow thermal equilibrium with the gas". Compare local and receiving-end status and record when the fault appeared.
Application boundary:RH change is not necessarily a moisture-content change
20How can unstable readings be separated from genuine process variation?
Why can adjacent probes disagree → Temperature, airflow, radiation and response differences can prevent equilibrium. → Use representative sampling and airflow and record Flow, sampling position and heat sources Compare independent process evidence and raw signals before deciding whether installation, interference or equipment is responsible. More filtering can hide a real abnormal event.
Verification: Keep conditions comparable and record correlation with process or equipment events. Check "Avoid local heating of the probe" and change one factor at a time.
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
21How should a persistent high or low bias be investigated before changing factors?
Does a dirty filter only slow response → It can also retain moisture or carry contamination and alter readings. → Avoid local heating of the probe and record Contaminants and filtration Systematic bias can arise from units, reference conditions, configuration, installation or the reference method. An unexplained correction can move one operating-point error to other conditions.
Verification: Align quantities, time bases and units first. Review the reference using "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment." and confirm that "Temperature, pressure and condensation" matches the configuration.
Application boundary:Ordinary probes are not guaranteed valid during condensation
22When is it appropriate to adjust a drifting zero or reference position?
Does a salt solution alone provide calibration traceability → No. Temperature, purity, equilibrium and an appropriate traceable reference matter. → Allow thermal equilibrium with the gas and record Calibration conditions and uncertainty Establish a genuine, stable reference condition that meets the method requirements before considering adjustment. Some instruments have no freely adjustable site zero.
Verification: Check "Assess filter protection and response together" and "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment." and retain before-and-after results. If the conditions cannot be established, remove external effects or use a qualified service.
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
23Which evidence helps diagnose intermittent alarms or failures?
Does temperature calibration validate humidity too → No. The humidity sensing chain requires its own verification. → Assess filter protection and response together and record RH or dew-point objective Intermittent faults need correlated event records, not just a normal display after recovery. Review alarm settings, communication status and actual process abnormalities separately.
Verification: Retain time, status codes, raw trends and the contemporaneous "Calibration conditions and uncertainty". Compare "Allow thermal equilibrium with the gas" and "Assess filter protection and response together" to locate the failing link.
Application boundary:A salt solution alone does not ensure traceability
24Why should repeated failures trigger a cause review instead of another identical replacement?
Repeated failures warrant a common-cause assessment. A salt solution alone does not ensure traceability If the external conditions remain unchanged, an identical construction or installation can experience the same failure again.
Verification: Summarise failed parts, service time and "Calibration conditions and uncertainty". Check "Avoid local heating of the probe" and "Heated-probe RH conversion needs a valid ambient temperature" and establish corrective action before selecting repair or redesign.
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
25What distinguishes a site comparison, an adjustment and a calibration?
Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. A comparison identifies differences; adjustment changes indication or parameters; calibration establishes a reference relationship under stated conditions. They are not interchangeable claims.
Verification: Define what performance and evidence must be established, using conditions relevant to "Temperature, pressure and condensation". Retain original and adjusted results, references and responsibility records.
Application boundary:Ordinary probes are not guaranteed valid during condensation
26What must be checked again after replacing an instrument with the same basic model?
The same basic model does not establish identical options, software, calibration or accessories. Verify output, failure state and receiving-system compatibility; Confirm certificates, calibration and site change approval in writing. Previous system operation does not remove the need to verify a replacement.
Verification: Compare full order codes and revisions. Recheck critical points, failure states and interfaces using "Use representative sampling and airflow" before handover.
Application boundary:A salt solution alone does not ensure traceability
27Can every published maximum rating be achieved simultaneously?
No. RH change is not necessarily a moisture-content change Maximum values usually relate to particular options and conditions. Temperature, load, pressure, materials, speed or signal conditions may constrain one another.
Verification: Review "Flow, sampling position and heat sources" and "Calibration conditions and uncertainty" together. Obtain confirmation for the combined conditions instead of assembling unrelated maxima from separate pages.
Application boundary:RH change is not necessarily a moisture-content change
28Does a missing signal or zero indication establish that the process value is zero?
No. What can cause a persistently high RH reading → Condensation, contamination and cold spots must be excluded before adjustment. → Assess filter protection and response together and record Temperature, pressure and condensation Indication, measurement and transmission have distinct possible failure modes. Also consider "RH change is not necessarily a moisture-content change"; establish the actual process condition independently.
Verification: Check available status or failure indications and "Avoid local heating of the probe". For interlocks, follow the complete safety design rather than substituting a zero value for diagnosis.
Application boundary:RH change is not necessarily a moisture-content change
29Does one acceptable test point establish compliance across the working range?
No. Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. Test points and directions must reflect the working interval, relevant error mechanisms and acceptance purpose. Multiple points, reversal or load tests depend on the method.
Verification: Define acceptance coverage against "Temperature, pressure and condensation" and include critical operating points. Mark conditions outside the tests as unverified.
Application boundary:Ordinary probes are not guaranteed valid during condensation
30Are the largest range, highest accuracy class and most options always preferable?
Not necessarily. Options should serve the required objective; excess configuration can add cost, complexity or incompatibility. Ordinary probes are not guaranteed valid during condensation; Ordinary probes are not guaranteed valid during condensation. Establish essential requirements before comparing optional benefits.
Verification: Document the objective in "RH or dew-point objective" and why "RH or dew-point objective" is needed. Compare performance at actual working points rather than one headline metric.
Application boundary:Ordinary probes are not guaranteed valid during condensation
31Can every maintenance or recalibration interval simply be fixed at one year?
Not independently of risk and history. Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. Intervals depend on applicable law or contract, conditions, drift, maintenance and failure evidence. Generic advice cannot replace mandatory requirements.
Verification: Use "Does a salt solution alone provide calibration traceability → No. Temperature, purity, equilibrium and an appropriate traceable reference matter. → Allow thermal equilibrium with the gas and record Calibration conditions and uncertainty" and "A salt solution alone does not ensure traceability" to establish and review an initial plan. Retain the justification and approval for interval changes.
Application boundary:A salt solution alone does not ensure traceability
32Can parts from different brands be mixed if their physical interfaces fit?
Physical fit is insufficient. Temperature, pressure and condensation; Avoid local heating of the probe. Matching, materials, signals, calibration and approval boundaries can change with the combination.
Verification: Check the complete combination against "Allow thermal equilibrium with the gas" and obtain compatibility and acceptance evidence. An unconfirmed assembly must not be described as an approved system.
Application boundary:Ordinary probes are not guaranteed valid during condensation
33Does a hazardous-area, hygienic or safety label establish suitability for that duty?
Check the exact order configuration and valid documents rather than a series name. Confirm certificates, calibration and site change approval in writing "A salt solution alone does not ensure traceability" also matters; certificates, installation conditions and restrictions together define suitability.
Verification: Obtain certificate identifiers, covered models and special conditions and match them to the site. Similar names do not grant functional-safety or legal-metrology approval.
Application boundary:A salt solution alone does not ensure traceability
34What evidence makes the final result acceptable, reproducible and sustainable?
Establish the chain from quantity definition and application limits through configuration, mounting, reference and operating status. Use representative sampling and airflow A normal indication or brochure alone cannot demonstrate continuing system reliability.
Verification: Put "RH or dew-point objective", "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment." and "Does temperature calibration validate humidity too → No. The humidity sensing chain requires its own verification. → Assess filter protection and response together and record RH or dew-point objective" into the technical, acceptance and maintenance records, with responsibility for reviewing excursions.
Application boundary:A salt solution alone does not ensure traceability
35Can a DOWESTON model replace an installed instrument from another brand?
Possibly, after a full configuration and application comparison. A basic model name or matching output is not proof of equivalent replacement. RH or dew-point objective; Temperature, pressure and condensation; Avoid local heating of the probe. Record conclusions on material differences.
Verification: Provide the original full order code, data sheet and site conditions. Check "Verify output, failure state and receiving-system compatibility" and "Confirm certificates, calibration and site change approval in writing" and obtain the necessary test and approval evidence before replacement.
Application boundary:A salt solution alone does not ensure traceability
36Why choose DOWESTON, and what would make that reasoning evidence-based?
Base the decision on project compliance and documented delivery or service, rather than a slogan. "RH or dew-point objective" and "RH change is not necessarily a moisture-content change" are important family-specific checks. Claim only benefits supported by the offered product documents and written commitments.
Verification: Request the proposed configuration matching "RH or dew-point objective", test evidence and delivery/service terms. Do not infer unverified performance, approvals, origin or service life.
Application boundary:RH change is not necessarily a moisture-content change
37How can competing brands be compared beyond a single accuracy or price figure?
Use identical conditions and supply boundaries. RH or dew-point objective; Avoid local heating of the probe; Confirm certificates, calibration and site change approval in writing. Quotes with different ranges, compensation, accessories or calibration scope can conceal material differences.
Verification: Compare "Temperature, pressure and condensation", "Ordinary probes are not guaranteed valid during condensation" and mounting/acceptance conditions. Separate demonstrated, unverified and inapplicable items; do not claim unproven overall superiority.
Application boundary:Ordinary probes are not guaranteed valid during condensation
38How should purchasing compare cost without overlooking additions or rework?
Compare complete supply and use-cycle costs, not only the main instrument price. Avoid local heating of the probe; Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. List the actual installation, supporting equipment, calibration, consumables, downtime and service requirements without assuming any brand is always cheaper.
Verification: Use the same "RH or dew-point objective" configuration and "Calibration conditions and uncertainty" boundary. Separate equipment, accessories, commissioning and maintenance responsibilities and retain a traceable comparison.
Application boundary:A salt solution alone does not ensure traceability
39Why can RH change without added moisture?
RH depends on saturation vapor pressure at the current temperature. Verify Avoid local heating of the probe and record RH or dew-point objective. RH change is not necessarily a moisture-content change. Confirm the exact model and record the result before changing settings.
Verification: Avoid local heating of the probe and record RH or dew-point objective
Application boundary:RH change is not necessarily a moisture-content change
40Why consider dew point for dry gas?
RH uncertainty can dominate at low humidity; dew point may better express the objective. Verify Allow thermal equilibrium with the gas and record Temperature, pressure and condensation. Ordinary probes are not guaranteed valid during condensation. Confirm the exact model and record the result before changing settings.
Verification: Allow thermal equilibrium with the gas and record Temperature, pressure and condensation
Application boundary:Ordinary probes are not guaranteed valid during condensation
41What happens when a humidity probe condenses?
Water can invalidate readings and contaminated deposits can cause persistent drift. Verify Assess filter protection and response together and record Flow, sampling position and heat sources. Heated-probe RH conversion needs a valid ambient temperature. Confirm the exact model and record the result before changing settings.
Verification: Assess filter protection and response together and record Flow, sampling position and heat sources
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
42Why can a partly cold-mounted probe condense?
Conduction can cool the sensor below dew point despite a warmer process average. Verify Use representative sampling and airflow and record Contaminants and filtration. A salt solution alone does not ensure traceability. Confirm the exact model and record the result before changing settings.
Verification: Use representative sampling and airflow and record Contaminants and filtration
Application boundary:A salt solution alone does not ensure traceability
43Can a heated probe directly represent ambient RH?
Heating changes local RH; ambient RH calculation requires the correct ambient temperature. Verify Avoid local heating of the probe and record Calibration conditions and uncertainty. RH change is not necessarily a moisture-content change. Confirm the exact model and record the result before changing settings.
Verification: Avoid local heating of the probe and record Calibration conditions and uncertainty
Application boundary:RH change is not necessarily a moisture-content change
44Can an external sampling line affect RH?
Temperature changes, adsorption and condensation can alter the sample state. Verify Allow thermal equilibrium with the gas and record RH or dew-point objective. Ordinary probes are not guaranteed valid during condensation. Confirm the exact model and record the result before changing settings.
Verification: Allow thermal equilibrium with the gas and record RH or dew-point objective
Application boundary:Ordinary probes are not guaranteed valid during condensation
45What can cause a persistently high RH reading?
Condensation, contamination and cold spots must be excluded before adjustment. Verify Assess filter protection and response together and record Temperature, pressure and condensation. Heated-probe RH conversion needs a valid ambient temperature. Confirm the exact model and record the result before changing settings.
Verification: Assess filter protection and response together and record Temperature, pressure and condensation
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
46Why can adjacent probes disagree?
Temperature, airflow, radiation and response differences can prevent equilibrium. Verify Use representative sampling and airflow and record Flow, sampling position and heat sources. A salt solution alone does not ensure traceability. Confirm the exact model and record the result before changing settings.
Verification: Use representative sampling and airflow and record Flow, sampling position and heat sources
Application boundary:A salt solution alone does not ensure traceability
47Does a dirty filter only slow response?
It can also retain moisture or carry contamination and alter readings. Verify Avoid local heating of the probe and record Contaminants and filtration. RH change is not necessarily a moisture-content change. Confirm the exact model and record the result before changing settings.
Verification: Avoid local heating of the probe and record Contaminants and filtration
Application boundary:RH change is not necessarily a moisture-content change
48Does a salt solution alone provide calibration traceability?
No. Temperature, purity, equilibrium and an appropriate traceable reference matter. Verify Allow thermal equilibrium with the gas and record Calibration conditions and uncertainty. Ordinary probes are not guaranteed valid during condensation. Confirm the exact model and record the result before changing settings.
Verification: Allow thermal equilibrium with the gas and record Calibration conditions and uncertainty
Application boundary:Ordinary probes are not guaranteed valid during condensation
49Does temperature calibration validate humidity too?
No. The humidity sensing chain requires its own verification. Verify Assess filter protection and response together and record RH or dew-point objective. Heated-probe RH conversion needs a valid ambient temperature. Confirm the exact model and record the result before changing settings.
Verification: Assess filter protection and response together and record RH or dew-point objective
Application boundary:Heated-probe RH conversion needs a valid ambient temperature
50Why compare condensation recovery during replacement?
Range and ingress rating do not establish equivalent contamination or recovery behavior. Verify Use representative sampling and airflow and record Temperature, pressure and condensation. A salt solution alone does not ensure traceability. Confirm the exact model and record the result before changing settings.
Verification: Use representative sampling and airflow and record Temperature, pressure and condensation
Application boundary:A salt solution alone does not ensure traceability
