Alpha Moisture Systems

Certified intrinsically safe to IECEx, ATEX, and cULus standards, our SADPmini2-Ex portable dewpoint hygrometer combines safety and performance — suitable for use in hazardous areas.

The SADPmini2-Ex advanced portable hygrometer is ideal for precise trace moisture measurement in hazardous environments and with potentially explosive gases — with logging capability and Bluetooth connectivity to our portable printer. The full-colour LCD shows multiple engineering units simultaneously, along with real-time graphing and screenshot features.

Market leading sensing technology combined with a unique desiccant head assembly ensures unparalleled speed of response and trace moisture detection. As a result, the SADPmini2-Ex offers exceptional sensitivity — accurate to ±2 °C (±3.6 °F) dewpoint — and fast, consistent operation with minimal air/gas usage.

Our SADPmini2-L advanced portable hygrometer is ideal for precise trace moisture measurement in industrial gases and compressed air — with logging capability and Bluetooth connectivity to our portable printer.

Market-leading sensing technology combined with a unique desiccant head assembly ensures unparalleled speed of response. As a result, the SADPmini2-L offers exceptional sensitivity, accurate to ±2 °C (±3.6 °F) dewpoint — and fast, consistent operation with minimal air/gas usage.

The SADPmini2-L is designed for ease of use and reliability in demanding environments, with a full-colour LCD display showing multiple engineering units simultaneously, along with real-time graphing and screenshot features and advanced data logging and connectivity to accurately record and store trace moisture measurement data for later analysis.

A powerful portable dewpoint hygrometer ideal for precise trace moisture measurement in industrial gases and compressed air.

Our SADPmini2 advanced portable hygrometer is designed for ease of use and reliability in demanding environments, with a rechargeable lithium-ion battery giving over 150 hours of continuous operation on a single charge. The full-colour LCD shows multiple engineering units simultaneously, along with real-time graphing and screenshot features.

Market leading dewpoint sensing technology combined with a unique desiccant head assembly ensures unparalleled speed of response. As a result, the SADPmini2 offers exceptional sensitivity — accurate to ±2 °C (±3.6 °F) dewpoint — and fast, consistent operation with minimum air/gas usage.

A fully self-contained, portable hygrometer designed to deliver precise trace moisture measurements of gases and dry compressed air for both industrial and laboratory applications.

With an accuracy of ±2 °C dewpoint and an overall range offered between -110 °C to +20 °C dewpoint, the Model DSP-FCI ensures reliable performance. The advanced dewSMART transmitter, utilizing ultra-high capacitance aluminum oxide sensing technology, guarantees unsurpassed repeatability and measurement precision — and is fully interchangeable without returning to Alpha Moisture Systems for calibration and setup. The hygrometer’s unique desiccant dry-down technology provides rapid response times, making it ready for spot-check readings with minimal air or gas usage. An integral sample flow control valve conditions high-pressure samples before introduction to the desiccant head assembly, and a built-in flow indicator with sample-specific gradation provides flow control.

Designed for ease of use, the DSP-FCI features a user-friendly interface and requires little to no maintenance. The digital screen offers versatile display options, allowing users to select from various moisture units, including °C, °F, ppb(v), ppm(v), ppm(w), g/m³, and lb/MMSCF. Additionally, the device includes a user-programmable parts per million (weight) function for specific gases, with pre-programmed settings for common gases like Air, Ar, H₂, SF₆, CO₂, and N₂.

A self-contained, portable hygrometer designed to deliver precise trace moisture measurements of gases and dry compressed air, certified intrinsically safe for hazardous applications.

Certified intrinsically safe to ATEX standards (ATEX Ex ia IIC T3/T4 Ga) and CE approved, the Model DSP-Ex is suitable for use in hazardous areas. With an accuracy of ±2 °C dewpoint and an overall range of -110 °C to +20 °C dewpoint, the DSP-Ex ensures reliable performance. The hygrometer’s unique desiccant dry-down technology provides rapid response times, making it ready for spot-check readings with minimal air or gas usage. The advanced dewSMART transmitter, utilising ultra-high capacitance aluminum oxide sensing technology, guarantees unsurpassed repeatability and measurement precision — and is fully interchangeable without returning to Alpha Moisture Systems for calibration and setup.

The DSP-Ex features a user-friendly interface and requires little to no maintenance. The digital screen offers versatile display options, allowing users to select from various moisture units, including °C, °F, ppb(v), ppm(v), ppm(w), g/m³, and lb/MMSCF. Additionally, the device includes a user-programmable parts per million (weight) function for specific gases, with pre-programmed settings for common gases like Air, Ar, H₂, SF₆, CO₂, and N₂.

An advanced, panel mount, single channel display, engineered to seamlessly integrate with our range of online dewpoint transmitters, for continuous and precise trace moisture measurement in process gases, dry compressed air and dry rooms/chambers.

The DS4000 offers unparalleled adaptability and exceptional accuracy to ±2 °C (±3.6 °F) dewpoint. Its display can be user-configured to show dewpoint in °C or °F, ppm(V), ppb(V), ppm(W), g/m³ or lb/MMSCF, tailored to the specific needs of each application.

It provides comprehensive data management, including a linear 0-20 or 4-20 mA isolated retransmission signal and is user-configurable to input pressure for pressure dewpoint conversion — offering a solution that is as versatile as it is reliable.

A panel mount, single-channel display precisely engineered for continuous, accurate trace moisture measurement in process gases, dry compressed air and dry rooms/chambers — when used with one of our compatible dewpoint transmitters.

Tailored to meet the needs of routine applications with simplicity and efficiency, the DS1200 offers key features factory preconfigured to customer specifications, including the display of dewpoint in °C or °F, ppm(V), g/m³ or lb/MMSCF.

The DS1200 represents an ideal entry-level solution for operators seeking reliable moisture measurement without the need for the advanced configuration options of the DS4000 or DS1500.

A sophisticated, panel mount, single-channel display, designed to enhance continuous trace moisture measurement in various gases and dry compressed air systems — when used with a compatible dewpoint transmitter.

The DS1500 incorporates RS485 and MODBUS (RTU) capabilities to facilitate remote interrogation and comprehensive communication with the AMT, AMT-Ex and PDT dewpoint transmitters, for continuous trace moisture measurement across a range of applications.

Factory configured to user specifications, the DS1500 can display measurements in °C dewpoint, °F dewpoint, ppm(V), ppb(V), g/m³, or lb/MMSCF on a large, six-digit, red LED display, providing clear and immediate data readouts. It offers Process Variable (PV) retransmission in 0-20 or 4-20 mA and is user-configurable to input pressure for pressure dewpoint conversion — offering a solution that is as versatile as it is reliable.

A compact, self-contained, single-channel, 4-digit LED display designed for seamless integration with the range of PDT dewpoint transmitters. Weighing only 125 g, this lightweight display is perfect for direct installation on the transmitter using the secure M12 connector.

The DIS030 display offers ease of use and installation, providing a straightforward solution when local indication is required. With its adjustable design, the display can rotate 270 degrees for better positioning, while the display fascia rotates 360 degrees to accommodate the placement of your dewpoint transmitter. The DIS030 can be user-configured, when ordered, to view readings in °C dewpoint, °F dewpoint, ppm(V) or ppb(V) according to your preferences.

Powered by a 4-20 mA loop, the DIS030 is suitable for continuous measurement when paired with our PDT Dewpoint Transmitter. This plug-in display requires little to no maintenance, ensuring hassle-free operation. For applications demanding additional functionality, consider our DS1200 display for most routine applications or the DS4000 display for more advanced applications requiring a user-configurable display and greater versatility.

A sophisticated single-channel, panel mount display, expertly engineered to integrate seamlessly with the Alpha Moisture Systems Dewpoint Sensor.

The Model 6020, combined with the Dewpoint Sensor, forms a high-precision dewpoint hygrometer system, ideal for accurately measuring trace moisture in process gases and dry compressed air. This system ensures long-term stability, rapid response and high sensitivity with an accuracy of ±2 °C (±3.6 °F) dewpoint.

Designed for operator convenience, the Model 6020 features our unique automatic calibration (AutoCal) and three hotkey functions accessible from the front panel, allowing easy setup of alarm trip points, unit selection and access restrictions. RS485 connectivity means users can easily configure the device for integration with PC systems, providing digital output for remote data interrogation. Each system is factory-calibrated and supplied with a calibration certificate traceable to National & International Humidity Standards at the National Physical Laboratory (NPL).

A reliable solution for continuous trace moisture measurement in process gases or compressed air, featuring our ultra-high capacitance aluminium oxide sensing technology for unmatched sensitivity, accuracy and speed of response.

Our AMT Dewpoint Transmitter is a compact 2-wire 4-20 mA loop-powered transmitter that offers continuous online moisture monitoring across various dewpoint ranges from -120 °C to +20 °C (-184 °F to +68 °F) accurate to ±2 °C (±3.6 °F) dewpoint.

Its advanced RISC microprocessor circuitry provides high resolution and sophisticated self-diagnostics. Equipped with a unique AutoCal span correction feature, the AMT Dewpoint Transmitter facilitates field calibrations and span checks, ensuring optimal accuracy between laboratory calibrations. The rugged stainless steel construction provides protection to IP66 / NEMA 4X, with the transmitter’s electrical connections made via a secure industrial connector.

A robust solution for continuous moisture measurement in process gases and compressed air, featuring ultra-high capacitance aluminium oxide sensing technology. Certified intrinsically safe to ATEX and IECEx standards for use in hazardous areas.

Our AMT-Ex Dewpoint Transmitter is a compact 3-wire, 4-20 mA, loop-powered transmitter that offers continuous online moisture measurement across various dewpoint ranges from -110 °C to +20 °C — accurate to ±2 °C (±3.6 °F) dewpoint.

Its advanced RISC microprocessor circuitry provides high resolution and sophisticated self-diagnostics. Equipped with a unique AutoCal span correction feature, the AMT-Ex Dewpoint Transmitter facilitates field calibrations and span checks, ensuring optimal accuracy between laboratory calibrations. The rugged stainless steel construction provides protection to IP66 / NEMA 4X, with the transmitter’s electrical connections made via a secure industrial connector.

A highly efficient and economical solution designed for trace moisture measurement in gases and dry compressed air, particularly suited for applications requiring monitoring of higher, ‘wetter’ dewpoints.

The PDT Dewpoint Transmitter offers a practical approach to continuous dewpoint measurement, catering for diverse requirements down to -60 °C dewpoint and available with three specific dewpoint ranges: -60 °C to +20 °C, -40 °C to +30 °C and -20 °C to +50 °C.

The compact 2-wire, 4-20 mA loop-powered transmitter features a bulk polymer sensing element — delivering excellent accuracy, stability and response speed across various dewpoint ranges. It is engineered to withstand pressures up to 5,000 kPa (50 barg), ensuring robust performance under demanding conditions. It offers IP65/NEMA 4 protection and for enhanced safety and reliability, the electrical connections are made via a durable M12 industrial connector.

The accuracy of a laboratory standard hygrometer in a compact, transportable package. Equipped with a thermo-electric chiller for precise control of the chilled mirror temperature, this hygrometer is ideal for accurate measurement of trace moisture in gases.

The CMH-P2 Portable Chilled Mirror Hygrometer is a trusted choice for calibration engineers and manufacturing personnel, offering the Primary Standard Measurement Technique in a portable, self-contained unit. Perfect for troubleshooting, continuous monitoring, and convenient spot-check measurements, this hygrometer helps eliminate downtime, reduce maintenance costs and improve quality control.

Featuring a drift-free, highly durable chilled mirror sensor with minimal maintenance requirements, certified to National & International Humidity Standards, the CMH-P2 provides all the standard features of the CMH-RPC model in a portable form. With quick dry down, fast response and long battery life, accurate data can be collected for an entire shift or spot check measurements conducted over several days without needing to recharge the battery. The Automatic Balance Control function standardises and automatically corrects for contaminants, to ensure reliable measurements.

Featuring 3-stage chilled mirror technology and integral cooling, the CMH-RPC delivers precise and continuous moisture measurements up to -95 °C frost/dew point, translating to 37 ppb(V), making it an indispensable tool for high-accuracy applications.

The CMH-RPC offers unmatched accuracy for critical applications in laboratories and research facilities and as a reference standard for calibrating other moisture measurement instruments, delivered ready for immediate bench-top installation.

Our Model CMH Chilled Mirror Hygrometer accurately measures the dewpoint of a gas by cooling a mirrored surface, over which the gas flows until a layer of dew forms on the surface.

Specifically designed to precondition pressurised gas samples for dewpoint measurement, our PSS is the ideal sample system for the SADPmini2, SADPmini2-L and SADPmini2-Ex Dewpoint Hygrometers.

The PSS ensures optimal sample conditioning for accurate dewpoint measurements and a versatile solution for trace moisture analysis in various applications, including hazardous areas.

Whether for intermittent use or spot checks, the PSS offers a reliable, lightweight solution for accurate dewpoint measurement in any field condition. The system comes equipped with an integrated pressure regulator and flow indicator, allowing for precise control over sample flow and pressure, and a padded carrying case, ensuring protection and ease of transport to any site.

Specifically engineered to regulate sample line pressure, enabling controlled and accurate trace moisture measurement in process gases and dry compressed air.

The SS-B Dewpoint Sample System delivers controlled and accurate trace moisture measurement in process gases and dry compressed air. It offers a low-cost, compact design that integrates essential components such as a pressure regulator, transmitter holder, and flow meter, capable of managing flow rates up to 5 litres per minute. Designed for wall mounting, the SS-B ensures optimal sampling conditions at atmospheric pressure, significantly enhancing the accuracy of dewpoint measurements.

Constructed with high-quality components including stainless steel fittings and a robust hammer-coated back plate, the SS-B provides dependable performance for a wide range of industrial applications. For specific requirements, our team can create custom-engineered solutions to meet precise analysis needs.

Designed to extract, condition and analyse a sample of natural gas with potential TEG or heavy hydrocarbon condensate presence. — ensuring samples are optimal for accurate moisture measurement, then safely vented or returned to the process.

Designed for reliable moisture analysis in the presence of Triethylene Glycol (TEG) or heavy hydrocarbon condensate, the SS-TEG Dewpoint Sample System is essential for natural gas dehydration processes. Triethylene Glycol is hygroscopic, effectively absorbing water from natural gas, which is crucial for meeting pipeline specifications and preventing corrosion and hydrate formation. TEG contactors, integral to natural gas processing plants, facilitate the glycol dehydration process within a contactor tower. As the glycol absorbs moisture and becomes saturated, it descends, allowing the dried natural gas to ascend for further processing.

Precision-engineered sample systems for continuous trace moisture measurement of process gas and dry compressed air, designed specifically for low-pressure systems.

The SS-1 operates with the sensor at atmospheric pressure, while the SS-2 operates at system pressure, both accommodating a maximum inlet pressure of 50 barg (725 psi). They include comprehensive pressure and flow control, sample filtration to remove particulates, an auxiliary inlet for a second sample or calibration gas, and an outlet for sample recovery or disposal.

Manufactured for durability and reliability, these systems offer a compact, easy-to-install design that comes fully assembled. Their modular build is ideal for panel, surface, or weatherproof mounting, and features high-quality stainless steel pipework and fittings, with all major components clearly labelled and a flow schematic displayed on the aluminium front panel.

Designed for high-pressure applications exceeding 100 barg, crucial for industries where condensation risk must be minimised to prevent bacterial growth and corrosion in systems.

The SS-3 and SS-4 are engineered to handle a maximum inlet pressure of 300 barg (4,350 psi), with the SS-3 designed to operate the sensor at atmospheric pressure, and the SS-4 at system pressure. They include comprehensive controls for pressure and flow, sample filtration to protect against particulates, an auxiliary inlet for additional sample streams or calibration gases, and an outlet for sample recovery or disposal.

Manufactured for durability and ease of use, these systems come fully assembled with a compact, modular design that can be mounted on panels or surfaces, with an optional weatherproof enclosure. The construction includes high-quality stainless steel pipework and fittings, and all internal electrical connections are securely wired to the main terminal block. Each major component is labelled, and a clear flow schematic is visible on the aluminium front panel.

An easy-to-install, compact sample system for sampling trace moisture content in clean, dry natural gas — suitable for installation in hazardous areas.

Manufactured using high-quality components, the SS-NGH includes a particle filter, flow indicator, sensor/transmitter, sensor holder, sensor cable, pressure gauge and a heated pressure regulator.

A range of Alpha Moisture Systems’ displays are suitable for installation in the safe area with a Zener barrier or signal isolator. Installing a sample system for your natural gas applications will help reduce contamination levels and process pressures with the process stream in the liquid phase.

The SS-NGH is configurable so there is pressure reduction upstream of the sensor for measuring atmospheric pressure dewpoint and moisture concentration and a reduction in pressure downstream of the sensor for disposal after measuring the dewpoint at sample pressure.

Designed for reliable performance, the SS-NGH sample system ensures accurate and efficient trace moisture measurement in natural gas applications. While we can supply a standard configuration, this sample system is customizable to suit your application requirements.

A portable printing solution, ideally suited for the demanding conditions of fieldwork. The lightweight printer connects via Bluetooth to our SADPmini2-L and SADPmini2-Ex dewpoint meters, rapidly printing live data, stored readings, or screenshot graphs.

Engineered for portability, the BTP01 Printer comes equipped with a protective carry case featuring a belt loop for enhanced device security. The transparent window on the case allows easy access to function buttons without removing the printer, minimising the risk of damage.

It features a direct thermal printing method for high-quality, maintenance-free outputs, along with easy paper roll replacement, ensuring minimal downtime and maximum efficiency.

Our Air Sampling Vacuum Pump (ASVP) is engineered to deliver the optimal flow of ambient air for sampling in dry rooms, cleanrooms, or environmental chambers. This unit ensures precise moisture measurements by providing the necessary airflow to our range of portable dewpoint hygrometers.

Designed for versatility and safety, the ASVP supports accurate moisture measurement across various applications, including dry or clean rooms, glove boxes, environmental chambers, product drying, and cool stores — providing an optimal flow of ambient air to the SADPmini2, SADPmini2-L or SADPmini2-Ex portable dewpoint hygrometers.

Offering an optimal flow rate of 2 litres per minute for accurate sampling, the ASVP is user-friendly with an easy-to-read colour display, a simple four-button navigation interface, a motion detection feature for usage alerts, a lockable keypad to prevent tampering and a smooth finish for easy decontamination. The ASVP is certified as intrinsically safe for operation in flammable atmospheres, allowing it to be used in potentially explosive zones — when combined with the SADPmini2-Ex portable dewpoint hygrometer.

Our Sensor Holder/Sample Cell is designed to optimise sampling conditions for all dewpoint transmitter installations and is available with a variety of inlet/outlet fittings to suit specific use cases or requirements.

Constructed from durable 316 stainless steel, the Sensor Holder/Sample Cell is engineered to pass the sample gas through the unit without risk of contamination. Its design incorporates high-quality stainless steel compression fittings, ensuring a secure and leak-proof connection for reliable sampling.

This essential accessory ensures that your system operates at peak efficiency, facilitating easy transmitter removal for annual calibration without compromising system integrity.

Maximise precision and reliability with our comprehensive dewpoint calibration services, designed to ensure the accuracy of your moisture measurement instruments.