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2-Wire Humidity Transmitter

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Product Name:2-Wire Humidity Transmitter

2-Wire Humidity Transmitter

Application

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Product Description:

2-wire RH/T Transmitter RHT

Low cost
Temperature compensation system
Two 2-wire transmitters for RH and temperature
Optional built-in Pt temperature sensor
Optional stainless steel sintered filter
IP65 protection

Using thin-film sensor with capacitance changing proportionally to medium relative humidity, RHT measures RH of air and non-aggressive gases and converts it into standard 4-20mA 2-wire signal. A built-in temperature drift compensation system guarantees good stability of measurement and an additional temperature sensor or second 2-wire transmitter may be built-in for measurement of both medium relative humidity and temperature. The RH transmitter is factory calibrated and does not need custom adjustment, while the temperature transmitter can be additionally calibrated on-site. The device is available in 3 variants with different mounting and temperature ranges. All this, in addition to the high protection class, the small size, and the low price, make RHT a convenient solution for many RH measurement applications.

RHT 2-wire Humidity Transmitter Technical specifications

Input
Humidity	capacitive sensor, 0 - 100 %RH
Temperature (option)	Pt100...1000 (w=1.385), -20 ~ 90 °C
RH adjustment	not needed (factory set)
Temperature ZERO adjustment	± 20%
Temperature SPAN adjustment	± 20%
Output
RH current output	4 - 20 mA, 2-wire
- input range correspondence	0 - 100 %RH
Temperature current output (option)	4 - 20 mA, 2-wire
Linearity proportional to	measured value
RH output limit	100% RH for condensation
Power supply
Supply voltage	8 - 36 VDC
Admissible variations	1 Vp-p at 50 Hz
Maximum line load	800 at 24V/20mA
Accuracy
RH measurement error	2.5% from span
Temperature measurement error	0.5% from span
Non-linearity	within measurement error
Temperature drift for RH	0.05% from span for 1°C
Temperature drift for temperature	0.01% from span for 1°C
Operating conditions
Ambient temperature	-10 ~ 60°C
Ambient humidity	0 - 98 %RH, non-condensing
Design and materials
Case material	ABS plastic
Sensor protection	plastic cap with stainless steel mesh
Sintered filter (option)	stainless steel, 75 m
Wiring	screw terminals inside housing
Protection class	IP65 (NEMA 4, 4x)

RHT 2-wire Humidity Transmitter Ordering code RHT* - G6 - #1.#2

Code	Feature or option	Code values
*	Variant	A - for wall mounting, B - for in-hole mounting, D - high-temperature
G6	Stem length 'n' [mm]	100500 (step 10 mm)
#1	Built-in temperature sensor / transmitter	X - none, D - Pt100, F - Pt500, G - Pt1000, TT - 2-wire transmitter
#2	Sintered filter	X - none, S - sintered filter mounted