Compact transmitter designed for demanding industrial applications. Features several probe options for different application needs and excellent stability of measurement.

• Six models for demanding applications:
  - HMT311 for wall mounting
  - HMT313 for duct mounting and tight spaces
  - HMT314 for high pressures up to 100 bar and vacuum conditions
  - HMT315 for high temperatures
  - HMT317 for high humidity applications, warmed probe option
  - HMT318 for pressurized pipelines up to 40 bar
• Next-generation Vaisala HUMICAP® Sensor for excellent accuracy and stability
• Full 0 ... 100 % RH measurement, temperature range up to +180 °C
• Small size, easy to integrate
• Insensitive to dust and most chemicals
• NIST traceable

Relative humidity measurement
Measurement range		0 ... 100 % RH
Accuracy at +20 °C (68 °F)		± 1.0 % RH (0 ... 90 % RH)
		± 1.7 % RH (90 ... 100 % RH)
		Vaisala HUMICAP® 180R
		Vaisala HUMICAP® 180RC
Temperature measurement
Measurement range
depending on probe model			-70 ... +180 °C (-94 ... +356 °F)
Electronics
Two analog outputs,		0...20 mA or 4...20 mA
selectable and scalable
Serial output		RS-232C
Operating voltage		12 ... 35 VDC, 24 VDC
Power consumption		30 mA with RS-232
General
Operating temperature range		-40 ...+60°C (-40...+140°F)
for electronics
Operating pressure
HMT314		0...100 bar
HMT318		0...40 bar
HMT315, HMT317		vapor tight
Storage temperature range		-55...+80°C (-67...+176°F)
Transmitter housing material		G-AlSi10Mg
Transmitter base material		ABS/PC
Housing classification		IP65
Sensor protection
		PPS grid with stainless steel net
		PPS grid, Sintered filter
		Membrane stainless steel filter