Transmitters – Alpha Moisture Systems

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Dewpoint transmitters

Our range of transmitters is designed for continuous online measurement of trace moisture in industrial gases and dry compressed air.

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How our dewpoint transmitters work

Our dewpoint transmitters are designed to measure trace moisture levels down to low parts per billion (ppb) in both hazardous and non-hazardous applications, making them versatile for a wide range of environments.

The proprietary aluminium oxide sensing technology in our dewpoint transmitters ensures superior process control, offering unparalleled sensitivity and reliability, even under the demanding conditions of industrial applications and extreme environments.

Our dewpoint transmitters can be used individually or as part of a more complex engineered solution, such as a continuous online trace moisture measurement system or a dewpoint sample system. Options include the standard 2-wire loop-powered AMT transmitter or the intrinsically safe AMT-Ex for hazardous areas.

All Alpha Moisture Systems transmitters feature our AutoCal function, which enables users to perform span checks and correct deviations between annual laboratory calibrations.

For seamless integration and real-time data access, our transmitters are fully compatible with various display controllers, including the standard DS1200, advanced DS4000, or the enhanced DS1500 with MODBUS RTU displays. Each transmitter is supplied with a calibration certificate traceable to National and International Humidity Standards at the National Physical Laboratory (NPL), ensuring accuracy and reliability from the moment of installation.

Key features of the range include:

Easy to use, reliable and efficient.

Ultra-high capacitance moisture sensing technology.

Guaranteed accuracy of ± 2 °C (± 3.6 °F) dewpoint traceable to National & International Humidity Standards.

Dewpoint ranges offered between -110 °C to +20 °C dewpoint.

Desiccant dry-down technology ensures the dewpoint sensor remains dry between tests for a quick response time.

AutoCal span correction function ensures optimum accuracy between laboratory calibrations.

Additional features include:

Both general-purpose and intrinsically safe models are available.

Choice of measurement units in °C or °F dewpoint and absolute values in ppm(v), ppm(w), mg/m³ or lb/MMSCF (depending on model).

Digital display with intuitive menu structure and choice of interface languages, making it easy to use, view and set user preferences.

Supplied with a calibration certificate traceable to National & International Humidity Standards.

Strong, durable, rugged construction

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Key Applications

Our dewpoint transmitters are employed across a range of critical industries due to their speed and accuracy, ensuring the safety and efficiency of a variety of applications through accurate continuous trace moisture measurement:

AerospaceFor the production of high-specification aeronautical parts, vacuum furnace heat treatment with dry argon is essential, and NADCAP mandates the testing of welding shield gas at the torch head for dryness. Our range of dewpoint transmitters provides continuous trace moisture measurement, ensuring the feed gas for shielding stays within the required moisture content range, maintaining ideal conditions.

Breathing AirHigh moisture levels in breathing air, as used in diving, firefighting, and defence applications, pose health risks and discomfort. Moisture condensation from high humidity levels in compressed air can lead to blocked airlines or cylinder corrosion, with potentially fatal consequences. Our dewpoint transmitters allow for the continuous monitoring of trace moisture throughout the pipe network.

Food and BeverageMoisture control is critical in the food and beverage industry to prevent food quality loss. Packaging foods in an atmosphere of dry gases like Nitrogen and carbon dioxide extends shelf life. Our dewpoint transmitters enable continuous trace moisture measurement, reducing waste and carbon footprint.

HDPE ProductionEthylene and propylene, key for manufacturing chemicals and plastics, require precise moisture content monitoring for polymerisation efficiency and catalyst yield. Our range of dewpoint transmitters ensures process optimisation, product quality, and reduced maintenance costs by providing accurate and consistent trace moisture measurements.

Injection MouldingMoisture adsorbed on plastic pellets can lead to extrusion failures and quality degradation. Our dewpoint transmitters measure trace moisture in the circulating air to detect possible dryer failures, enhancing process efficiency and reducing costs.

Medical GasesIn medical applications, compressed air and gases must be clean and almost sterile, free from contaminants including water vapour and bacteria. Our dewpoint transmitters offer permanent moisture monitoring in air/gas lines, which is essential for maintaining safe patient care environments.

Natural Gas and LNGThe liquefaction and regasification processes in natural gas supply are crucial for global energy distribution. Moisture presence poses risks of pipeline and valve freezing. Installing a dewpoint transmitter ensures accurate trace moisture measurement, safeguarding gas quality and system integrity.

PharmaceuticalsIn pharmaceutical manufacturing, accurate moisture determination is crucial for product consistency and quality. Our range of dewpoint transmitters provides fast, repeatable, and accurate online dewpoint control, essential for the control of blanketing gases.

Power GenerationEnergy production priorities include safety, cleanliness, and efficiency. Our range of dewpoint transmitters measures trace moisture, protecting equipment, reducing costs, and improving efficiency in power generation processes.

Welding GasesDifferent welding processes require specific inert gases for atmospheric shielding. Our dewpoint transmitters continuously measure moisture to ensure feed gas used for shielding remains within the specified range, maintaining optimal conditions for welding.

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.

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