Wired Ceramic Moisture Sensor Transmitter

FM and CSA certified, low cost, two-wire, intrinsically safe dew point transmitter for continuous measurement of the moisture content in inert gases or safe classified areas. Power can be from any 12 to 28 VDC source. The sensor can be installed directly in a main gas line or in a sample stream. Only periodic recertification is required to maintain calibration accuracy.


Measurement Range -148°F to + 68°F (-100°C to +20°C) dewpoint
0 to 3000 PPMv moisture content
Accuracy ±3.6°F (±2°C) dewpoint
Power Supply 12-28 VDC reverse polarity protected
Output 4-20 mA linear, current source configurable over the entire measurement range
FM and CSA Certifications Class I, Division 1, Groups A, B, C, & D T4 hazardous areas
Operating Temperature -40°F to +140°F (-40°C to +60°C)
Operating Pressure Vacuum to 5000 psi
Temperature Compensated From -40°F to +140°F (-40°C to +60°C)
Flow Rate 2 to 10 SCFH (1 to 5 L/min) mounted in sampling block; 0 to 30 ft/sec (0 to 10 m/sec) velocity when inserted directly
Connection Two wire loop powered DIN-style with screw terminal contacts Backward compatibility with 3-wire installations
Traceable Certification -100°F to +68°F dewpoint traceable to NIST. For dewpoints < -100°F, direct reference to a fundamental optical dewpoint hygrometer
Environmental Protection NEMA 4 (IP66)
10μ HDPE Guard (standard)
80μ Sintered Metal Guard (optional)
Self Diagnosis Condition : Output
Sensor fault : 3 mA
Under-range dewpoint : 3 mA
Over-range dewpoint : 23 mA