Continuous measurement of moisture in oil with excellent long-term stability Proven Vaisala HUMICAP® sensor, 10 years in oil applications Measurements in lubrication, hydraulic and transformer oils Excellent pressure and temperature tolerance Measuring water activity - ppm calculation for transformer oil Small size, easy to integrate NIST traceable calibration Applications: e.g. monitoring of transformer oil and of lubrication systems in marine and paper industry

Water activity measurement
	Measurement range
	Accuracy	0 ... 1
	0 ... 0.9	±0.02
	0.9 ... 1.0	±0.03
	Sensor	Vaisala HUMICAP®
Temperature measurement
	Measurement range	-40 ... +180 °C
	Accuracy at +20 °C	± 0.1 °C (± 0.18 °F)
	Sensor	Pt 100 IEC 751 1/3 class B
Operating environment
	Temperature (electronics)	-40 ... +60 °C (-40 ... +140 °F)
	Storage temperature	-55 ... +80 °C (-67 ... +176 °F)
	Pressure range for MMT318 with ball valve up to 120 °C	0 ... 40 bar
	Pressure range for MMT317	0 ... 10 bar
Inputs and outputs
	Operating voltage Uin	24 VDC (10 ... 35 VDC)
	Power consumption @ 20 °C, Uin = 24 VDC with RS-232C	20 mA
	Two analog outputs, selectable and scalable	0 ... 20 mA or 4 ... 20 mA
	Serial output	RS-232C
Mechanics
	Probe cable length	2, 5 and 10 m
	Material
	transmitter housing	G-A1Si10Mg
	transmitter base	ABS/PC
	Housing classification	IP65 (NEMA 4)