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Since 1960, Shaw Moisture Meters has been at the forefront of hygrometer design and manufacture and are proud of our status as the globally recognised leaders in trace moisture measurement. Shaw Moisture Meters extensive range of dewpoint meters, hygrometers and moisture analysers have been specifically designed to meet the most demanding requirements specified by industry. On an individual user level, Shaw Moisture Meters products are designed to be reliable, easy to install and simple to operate. It’s why Shaw Moisture Meters can supply all our products with a generous warranty that guarantees reliability and performance.

The SHAW guarantee is complimented by Shaw Moisture Meters commitment to deliver an exemplary service every time. Shaw Moisture Meters go above and beyond to ensure they build a professional relationship that continues for years to come.-


Model SDHmini-Ex Hand Held Dewpoint Meter

A hand held, compact, innovative, portable dewpoint meter

The Model SDHmini-Ex hand held portable dewpoint meter sets new industry standards for portable dewpoint measurement equipment. Intrinsically safe and portable, this dewpoint hygrometer offers quick and reliable spot check measurements of dewpoint and trace moisture content for industrial applications. This robust and lightweight hand held instrument features an intuitive menu structure and advanced features which enable the user to perform measurements in the toughest of environments, quicker and easier than ever before.

Certified intrinsically safe to ATEX, IECEx and UL standards, the SDHmini-Ex is the perfect tool for reliable measurements in hazardous areas. In addition, the robust housing not only contains the SHAW moisture sensor, desiccant chamber and gas sample ports but also incorporates the signal conditioning circuitry, memory management and a full colour graphics LCD. An on-board rechargeable lithium-ion battery provides over 150 hours of continuous operation and operates with the following ten language options: English, German, French, Spanish, Portuguese, Russian, Italian, Chinese, Japanese and Korean.

The hand held portable dewpoint meter incorporates powerful microelectronics to provide automatic calibration with real time data logging graphical formats. Up to 300,000 readings can be captured and displayed with USB and Bluetooth interfaces for PC communication and printing.-

Specification Sheet Instruction Manual


Model SADP Portable Hygrometer

A portable hygrometer for rapid moisture checks or continuous use on flowing gas or air

Easily portable, ready for spot checks or continuous use, this battery powered portable hygrometer indicates both dewpoint temperatures and water vapour to less than one part per million, on the large meter dial. As the reading is specific to water vapour, calibration is accurate for different gases. Accuracy is guaranteed to better than one part in a million of moisture in very dry air or gas.

The key to the SHAW automatic dewpoint meter is the unique desiccant head and sensor assembly which allows the dewpoint sensor to be kept dry between tests, ensuring that the instrument is always available for rapid spot checks of moisture in gases and compressed air. Note the absence of knobs, calibrating, cooling and servicing as required by some other methods and the automatic dry down measuring head which ensures quick response from the sensor.

Certified intrinsically safe for use in hazardous environments to ATEX and IECEx standards. The key to the SADP portable hygrometer is the SHAW moisture sensor which allows a rapid one second response time from dry to wet. The SADP instrument is simple to use, blocking the outlet with a finger for a moment raises the measurement head, allowing a speedy measurement of the sample gas.-

Specification Sheet Instruction Manual


The SHAW single channel inline moisture analysers have been developed to ensure provision of accurate moisture analysis.

SHAW inline moisture analysers combine robust construction and advanced electronics to meet the requirements of a wide range of applications requiring continuous inline analysis at a single sample point, therefore ensuring provision of accuracy through a long and reliable service life.

All Shaw Moisture Meters trace moisture analysers are used in conjunction with our full range of dedicated SHAW dewpoint sensors, covering an overall range from -100 °C to +20 °C (-148 °F to +68 °F) dewpoint, 0.01 to 23,000 ppm(v).

Furthermore, our range of inline moisture analysers combine various cabinet types from compact panel mount to robust weatherproof or bench mounting cabinets, with power supply, electrical output and indication options, tailored to meet your exact requirements. Whatever the application, you can be assured our inline moisture analysers will not be beaten for long term reliability and accuracy.-


Dewpoint Sensor Technology. SHAW – the original and the best.

When buying a SHAW dewpoint sensor, you know that you’re buying into over 60 years of proven technical experience. The aluminium oxide dewpoint sensor, used for measuring moisture in air and gases is a great example of why you can always put your trust in us.

Construction of the aluminium oxide sensor is critical to the performance and reliability of systems and yet the construction varies from manufacturer to manufacturer. Our methods are tried, tested and trusted and involve layering and treating high quality components in such a way that we can control sensor speed, sensitivity and base capacity. Unlike other manufacturers, we have the capability to manufacture the dewpoint sensor’s base layer with a level of precision that ensures a stable, reliable and drift free dewpoint sensor. Plus our continuous research and development programme has enabled us to manufacture uniform and water vapour specific pores for rapid and predictable response.

The overall measurement range covered by the sensor is –100 °C to +20 °C (-148 °F to +68 °F) dewpoint, which corresponds to 0.001 ppm to 0.2 percent by volume.

● P (Purple): -100 °C to 0 °C (-148 °F to +32 °F) DP, 0 – 6,000 ppm
● S (Silver): -100 °C to -20 °C (-148 °F to -4 °F) DP, 0 – 1,000 ppm
● G (Grey): -80 °C to 0 °C (-112 °F to +32 °F) DP, 0 – 6,000 ppm
● R (Red): -80 °C to -20 °C (-112 °F to -4 °F) DP, 0 – 1,000 ppm
● B (Blue): -80 °C to +20 °C (-112 °F to +68 °F) DP, 0 – 23,000 ppm

Specification Sheet Sensor Technology Contamination List


Sample Systems for Process Air or Gas Analysis

Solutions for the extraction and analysis of gas or air sampling

Shaw Moisture Meters Sample Systems are solutions for extracting and analysing a representative sample of the process air or gas, which is then either vented off to atmosphere or returned back into the process line.

These Sample Systems have been developed through many years of experience in industrial and process applications and all sample systems are constructed using high quality components. Utilising SHAW Dewpoint Sensor technology and ensuring long term reliability in the harshest environments, all SHAW sample systems are suitable for the SHAW range of portable dewpoint meters, inline hygrometers and dewpoint analysers.

The standard range of Sample Systems has been designed to cater for most applications, however, if your particular requirements are not met by any of these shown, our engineers can design a system specifically for your application.-


SHAW dewpoint transmitters Model SDT and Model SDT-Ex are designed to meet the stringent demands of industrial applications and extreme environmental conditions.

Both dewpoint transmitters, the Model SDT and SDT-Ex utilise the industry standard, ultra high capacitance SHAW moisture sensing technology. Various dewpoint ranges are available covering an overall range from -100 °C to +20 °C dewpoint (-148 °F to +68 °F). The 4 – 20 mA output is configurable in °C dewpoint, °F dewpoint, ppm(v), g/m³ and lb/MMSCF.

Incorporating advanced electronics, power can be derived from 7 – 28 V DC non isolated power source and configured to output a linear, isolated, 4 – 20 mA signal for distances up to 1,000 metres. The mechanics of the Model SDT and SDT-Ex dewpoint transmitters have been designed to cope with extreme environmental conditions.

The Model SDT-Ex is certified intrinsically safe to ATEX standards for use in hazardous areas using a signal isolator. Designed with the operator in mind, for reliable and accurate measurements, the SHAW Model SDT and SDT-Ex are extremely easy to install and operate, requiring little or no maintenance.-


Hygrometer and Dewpoint Meter Accessories

Shaw Moisture Meters supplies a wide product range of dewpoint meter accessories designed specifically to ensure accurate and reliable dewpoint measurement is possible with portable dewpoint meters, dewpoint hygrometers and inline moisture analysers. All of these items have been tried and tested over many years and they have proved to be both reliable and effective.

Sensor Holder
Model SEH, sensor holder is manufactured from solid stainless steel and houses the dewpoint sensor in inline installations. The unit has a design pressure rating of 400 bar (6000 psi) and can be supplied oxygen cleaned if required.

Pressure Calculator
Model PCALC, pressure dewpoint calculator brings together many different measurement units and enables calculations to be made for moisture levels at different pressures.

Flow Meter
Model FLMET, flow meter, provides a visual indication and fine control of sample flow. The unit is calibrated for the range 1 to 10 L/min air at normal temperature and pressure.

Filter Unit
An effective device for removing particulate contamination from sample gases. The filter cartridge is made from glass fibre and epoxy resin and can be washed in most solvents to extend its life.

Audible Alarm
Model AVA, audible alarm unit, rated IP65, the Model AVA has been designed for use where no other alarm unit is available.

Pressure Regulator
Model PRV, pressure regulator, is used for accurate control of pressure at all important points in a sample system. Two regulators are available for maximum inlet pressures of 200 bar (3000 psi) and 400 bar (6000 psi).

Pressure Gauge
Model PG, pressure gauge, is used at various points within a sample system to indicate local system pressure. Two standard ranges are available for pressure ranges 0 – 2 bar (0 – 30 psi) and 0 – 10 bar (0 – 160 psi). Other ranges are available on request.

Zener Barrier Unit
ZBU, shunt diode safety barrier, is used for inline applications in potentially hazardous areas or where there is a high risk of fire or explosion and comes in a custom enclosure.

Weatherproof Housing Unit
IP65 rated weatherproof housing unit, GRP enclosure with Perspex window for wall or pedestal mounting of dewpoint hygrometer and dewpoint sensor.

Bluetooth Printer
Compatible with SDHmini-Ex and SDHmini-L portable dewpoint meters. Powered by a rechargeable lithium-ion battery with a standby time of over 15 days and a 20 metre Bluetooth range.


Service and Calibration of Your Dewpoint Meters

All of our dewpoint meters, hygrometers and trace moisture analyzers are serviced, calibrated and supplied with a Calibration Certificate as standard. We offer a full calibration service and dewpoint meter service for most makes, encompassing an overall range of -110 °C to +20 °C (-166 °F to +68 °F) dewpoint.

Our engineers also carry out routine servicing, commissioning, fault finding, repairs and installation services in accordance with our accredited quality system.-


Important Information

The correct operation of a hygrometer and indeed any measuring instrument, can only be verified by periodic calibration against a dependable reference system. New instruments are delivered with a calibration certificate but this alone does not guarantee that they will provide good measurement throughout their operating life.

Incorrect operation, exposure to contaminants and corrosive gases, dewpoint sensor deterioration (ageing) and drift in electronics can all contribute to changes in the instrument accuracy over a period of time. It is therefore vital that dewpoint meters, hygrometers and inline moisture analyzers are recalibrated at regular intervals in order to ensure that the process to which it is applied is measured and controlled correctly.-