Model PPM1 Trace Moisture Analyzer
The PPM1 is a trace moisture analyzer designed specifically for monitoring moisture
levels in dew point and PPM units. This trace moisture analyzer utilizes an electrochemical
(P205) sensor in combination with a proprietary semi permeable diffusion
membrane. The principle of operation applies the Faraday’s Law of Electrolysis
which measures the dissociation current making it a fundamental measurement of
the moisture present. The PPM1 is ideally used in relatively clean, dry, inert gas
applications.
Applications Include
• Electric Power (Transformer Gas)
• Common Process Gases (Semiconductor Industry)
• Pharmaceutical Industry (Medical Gas)
• Gas Supplier Industry (Quality Control)
Fea t ures
• Sensitivity below 1ppm
• Fast response
• Long sensor life
• Low cost
• Fundamental measurement of moisture content
• Displays / outputs—dew point (C/F) and PPM values
Trace Moisture Analyzer
P P M 1
S P E C I F I C A T I O N S
Technology Used: P205
Measured Parameters: PPM / Dew Point
Accuracy: ± 5% of PPM reading, nominal
Range: PPM: 1250—0.1 ppmv
Dew Point: -20°C to –95°C
Pressure: 0 to 200 psig
Response Time: 90%of step change, in one minute, typically
Hysteresis: None
Operating /
Sampling Temperature: 0°C to 50°C
Electrical Outputs: 4-20mA (x2), scalable by end-user
RS-232C (bi-directional), programmable by end-user
Alarm, relays (x2), settable by end-user
Digital display—LCD, 2 line backlit
Power Requirements: 18 to 30Vdc, unregulated, 1A max.
Standard Cable: 6 feet (1.8m)
Dimensions: Enclosure (LWD) — 5.1” (13cm) * 3” (7.6cm) * 5.1” (13cm)
Weight — 4 lbs. (1.81kg)
Options / Accessories: Right angle mounting bracket (-MB)
Additional sensor cable length (-SCBL),
Specify desired length (500ft max.)