OM375 : Compact Dew Point Temperature Transmitter for OEM Applications

The exact monitoring of dew point temperature in compressed air systems, dryers for plastic and other industrial processes is becoming increasingly more important.The 0M375 is designed for measurement of low dew points in OEM applications down to -60°C.The core of the transmitter is the monolithic measure¬ment cell type HMC01 developed by Omicron Sensing in thin-film technology.An autocalibration procedure which is integrated in the device and years of experience in low humidity adjust-ment make an
accuracy of <2°C Td (±3.6°F Td) possible. The transmitter has one analogue output for dew point, frost point or ppm volume concentration.

Specifications :
Measuring Quantities
Dew Point (Td)
Dew Point Sensor	:	HMC01
Measuring Range	:	25°C to + 65°C
Accuracy	:	Traceable to intern. standards, administrated by NIST, PTB, BEV...

Response Time t₉₀	:	80 sec. -20°C Td —> -40°C Td (-4°F Td —> -40°F Td) 10 sec -40°C Td —> -20°C Td (-40°F Td —> -4°F Td)

Volume concentration
Measuring range	:	20...200 000ppm
Accuracy at 20°C (68°F) and 1013mbar	:	5ppm + 20% of reading

Outputs
Selectable and scalable	:	0 - 10V -1mA< I,< 1mA
analogue output for Td, Tf, Wv	:	4 - 20mA R < 500 Ohm

General
Supply Voltage	:	21...28V DC
Current Consumption at 24V DC	:	voltage output: typ. 40mA / during autocalibration: 100mA
	:	voltage output: typ. 80mA / during autocalibration: 100mA
Pressure Range	:	0...20bar (0...290psi)
Housing / protection class	:	Al Si Cu 3 / IP65
Electrical connection	:	M12 connector
Sensor protection	:	stainless steel sintered filter
Working temperature range	:	probe: -40...70°C (-40...158°F)
		electronic. -40...60°C (-40 140°F)
Storage temperature range	:	-40...60°C (-40...140°F)
Electromagnetic compatibility according to	:	EN 61326-1 EN61326-2-3 ICES-003 ClassB Industrial Environment FCC Part15 ClassB

relative humidity measurement instruments

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