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Dewpoint Sensor
By choosing our dewpoint sensor, you benefit from decades of proven engineering expertise dedicated to precision moisture measurement.
Using advanced aluminium oxide technology, our sensors provide reliable trace moisture measurement in both dry compressed air and a wide range of process gases. This long-standing reliability reflects our strong commitment to technical excellence.
The performance of an aluminium oxide sensor is highly dependent on the quality of its design and manufacturing. That’s why we employ proven production techniques, refined over many years, to precisely control key sensor characteristics such as response speed, sensitivity and baseline stability.
With a wide measurement range from –110 °C to +20 °C (–166 °F to +68 °F) dewpoint, equivalent to moisture levels from 0.001 ppm up to 2% by volume, Alpha Moisture Systems’ sensors are certified intrinsically safe to both ATEX and IECEx standards, making them suitable for use in hazardous environments.
Whatever the challenge — Alpha Moisture Systems has you covered.
- Highly customised solutions
- Trusted by industry leaders
- Distributors worldwide
- Over 30 years experience
Dewpoint Sensors, Precision Engineered for Unmatched Accuracy
Key features
- Wide dynamic range from 0.001 ppm to 0.2 percent by volume
- Stability, low hysteresis and temperature coefficients
- Flow independence
- Minimal maintenance required
- Accuracy of ±2 °C dewpoint, NPL traceable to -90 °C to +20 °C (-130 °F to +68 °F)
- Supplied with a calibration certificate traceable to National and International Humidity Standards, ensuring reliability and compliance
- Ultra-high capacitance aluminium oxide sensing technology for exceptional sensitivity, speed of response, accuracy, repeatability and stability
- Certified intrinsically safe to IECEx and ATEX standards (when used in conjunction with a barrier or isolator)
Technical Data
General | |
| Certification | Ex II 1G, Ex ia IIC T6 Ga |
| Calibration | National Physical Laboratory (NPL) traceable calibration available |
| Accuracy | Better than ± 2°C over full range |
| Operating Temperature | -20°C to + 50°C |
| Storage Temperature | -50°C to +70°C |
| Operating Humidity | 0-90% RH non-condensing |
| Mechanical Connections | M14 x 1.25mm pitch |
| Electrical Connection | Male coaxial plug |
| Approvals | CE, UKCA, NPL traceable |
| Accuracy | ± 2 °C (±3.6 °F) dewpoint |
| Dimensions | Overall length: 141 mm, protruding |
| Weight | Approximately 100 g |
| Sensor Materials | High purity aluminium, gold, nylon, |
Downloads
What's in the box?
Dewpoint Sensor
Calibration Certificate
Applications
AerospacePortable dewpoint meters are crucial in the production of aeronautical parts requiring vacuum furnace heat treatment with very dry argon, and for verifying the dryness of welding shield gas at the torch head according to NADCAP standards.
Breathing AirIn diving, firefighting, and defence applications, portable dewpoint meters are used to test high-pressure cylinder breathing apparatus to prevent equipment freeze caused by excess moisture, which could have fatal consequences.
Food PackagingPortable dewpoint meters are employed to conduct rapid spot checks of trace moisture levels, helping extend the shelf life of foods by reducing waste and carbon footprint through the use of dry gas in packaging.
HDPE ProductionUtilised for spot-checking moisture in flammable gases like ethylene feedstock, portable dewpoint meters ensure safety and efficiency in the production of polyethylene to avoid decreased yields caused by excessive moisture.
Injection MouldingPortable dewpoint meters are used to verify the dryness of air circulating through plastic pellets, improving surface finish, colour, and opacity of products — increasing yields and reducing production costs.
Medical GasesEssential for ensuring the reliability and accuracy of moisture content in hospital air systems, portable dewpoint meters help conduct continuous monitoring and quarterly spot checks to prevent microbial growth and potential infection — meeting NHS HTM02 standards.
Natural Gas and LNGPortable dewpoint meters are vital for preventing freezing issues in pipelines and valves, and preserving gas calorific value by accurately measuring moisture during transit from extraction to storage.
Natural Gas TransferBy identifying moisture ingress in gas distribution networks, portable dewpoint meters ensure the reliability of domestic gas appliances by facilitating rapid problem identification and resolution.
PharmaceuticalsPortable dewpoint meters are crucial for spot checks on inert blanketing gases in medication and medical device production, preventing microbial growth and ensuring the dryness necessary for freeze-drying processes.
Power GenerationFor routine spot checks on hydrogen used in alternator cooling, portable dewpoint meters help maintain efficiency and safety by ensuring moisture is below critical levels to avoid condensation.
SF6 Circuit BreakersPortable dewpoint meters help avoid excess moisture — a potential cause of arcing which decomposes SF6 into corrosive products, taking the switch out of service and interrupting the power to the distribution network.
Speciality GasesPortable dewpoint meters facilitate accurate moisture measurements in calibration gases, minimising the valuable product expended during the test process and ensuring compliance with specifications.
Related products
Whatever the challenge,
you can rely on Alpha
Moisture Systems
If you require a customised trace moisture measurement solution, book a consultation with our expert technical team and find out how you can increase the efficiency and productivity of your operations.
Dewpoint Calculator for Trace Moisture Measurement
in Gases & Compressed Air