2-wire Humidity Transmitter - RHT

  • 2-wire Humidity Transmitter
  • 2-wire Humidity Transmitter
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• 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
• Operating Ambient temperature: -10~60 °C
• Operating Ambient humidity: 0-98 %RH, non-condensing

  • Model Number: RHT
  • Data Sheet: Date Sheet File
Quantity:
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Product Specification

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 Ω 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 μm
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]
100…500 (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

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