Company Overview

With over 30 years’ experience, Alpha Moisture Systems is a global leader in the development, production and supply of portable dewpoint hygrometers, analysers and transmitters for the measurement of trace moisture content in industrial gases.

Alpha Moisture Systems Ltd manufacture a wide range of dewpoint meters and hygrometers, including the world’s most advanced portable hand held dewpoint meters, the SADPmini2 range, for the measurement of moisture content in gases and dry compressed air, with overall ranges available between -110 °C to +20 °C (-166 °F to +68 °F) dewpoint, i.e. nearly 1 part per billion to 23,000 parts per million.

Our instrument range of user friendly, microprocessor controlled dewpoint meters, hygrometers and dewpoint sampling systems have been designed to meet the most demanding requirements and needs expressed by the global industry.

The in-house capability we have to design and prototype enables us to manufacture bespoke equipment to customers’ exact requirements and specifications.

Alpha Moisture Systems’ dew point instruments are built using only trusted components, to the highest standards and specifications, compliant with our strict quality system which is accredited to ISO 9001:2015. We can therefore offer all our products with a generous warranty, guaranteeing reliability and performance.

Additionally, we employ experienced sales and technical engineering staff to ensure that customers applications are fully understood, so that we can provide solutions that are not only cost effective and on time, but also satisfy the most rigorous and demanding of specifications.

Mission Statement

To be at the forefront of hygrometer supply, design and innovation through continuous research & development, thus maintaining our competitive edge through lower costs and consistent high quality.


The accuracy of all new dewpoint meters, hygrometers and transmitters, manufactured and supplied by Alpha Moisture Systems, is verified against our standard reference hygrometers in accordance with our ISO 9001:2015 quality procedures.

All hygrometers manufactured by Alpha Moisture Systems are supplied with a certificate of calibration as standard. Our fully equipped, advanced laboratory is capable of calibrations encompassing a range from -110 °C to +20 °C (-166 °F to +68 °F) dewpoint, with the range -90°C to +20°C dewpoint directly traceable to Humidity Standards at the National Physical Laboratory (NPL).

In addition to this, we offer a full calibration service for most brands of hygrometer.

Field Calibration & Technical Support

In addition to laboratory calibration, we also offer an on-site or field calibration service where a verification and calibration can be carried out in-situ if the system is permanently installed.

Field calibration suits the customer who is particularly concerned about downtimes. Calibration certificates are generated on-site on the day of the calibration and our systems will automatically send out a timely reminder for your next calibration.