The battery portable, fast responding, PPM2 hygrometer from Edgetech Instruments uses a fundamental principle and a diffusion barrier to measure trace water vapor in gases from 0.1 to 1250 ppm v . Recalibration is not required under normal usage. The PPM2 is a trace moisture analyzer for monitoring dew/frost point temperature or ppm v water vapor content in gases. It is configured to meet remote, spot sampling or semi-permanent absolute humidity measurement requirements.
Detectible range is from 0.1 to 1250 ppm v water vapor. The PPM2 is ideally used for relatively clean, dry, inert gas measurement. Applications include air separation and purified gases, medical and pharmaceutical gases, semiconductor manufacturing. The PPM2 uses an electrolytic, phosphorus pentoxide sensor in combination with a protective, proprietary, semi permeable diffusion membrane.
The principle of operation applies Faraday’s Law of Electrolysis to determine the water vapor content by measuring the dissociation current needed to electrolyze the water molecules in a gas sample. The PPM2 is packaged in an impact resistant, waterproof, IP65 plastic enclosure. A USB bi-directional serial interface is standard as is a 115/230 Vac battery charger. All Edgetech Instruments hygrometers are manufactured and supported in the USA in a modern, ISO 9001:2015 registered, ISO/IEC 17025:2017 accredited facility. All calibrations and certifications are traceable to NIST.
