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Model RHT-20/RHT-21 Temperature and humidity sensor

Application

  • Temperature and humidity control in food processing facilities
  • Temperature and humidity control in greenhouses/fermentation chambers
  • Temperature and humidity control in air-conditioning equipment
  • Temperature and humidity control in pharmaceutical factories
  • Temperature and humidity control in clean rooms
  • Temperature and humidity control in museums, sample chambers, warehouses
  • Temperature and humidity control for musical instruments
  • Temperature and humidity control in plant factories

Features

  • Small-sized high precision sensor
  • Output of 4 mA to 20 mA DC and 1 V to 5 V DC are available for instrumentation.
  • Rigid protective structure assures safe use in environments exposed to dust particles or moisture.
  • Easy to install using three M3 screws.

International Standards

  • Our products do not have overseas safety regulations such as CE mark, UL standard, EN standard etc.
  • Products is compliant to the RoHS directive.

Rating/Performance / Graph Plots of Characteristics

Rating/Performance

Model RHT-20A RHT-20V RHT-21A RHT-21V
Detection sensor Humidity / Temperature
Measurable-
Humidity Range
0 to 100% RH
Humidity Accuracy ±3% RH 25 ºC: 20 to 80% RH  ±2% RH 25ºC: 20 to 80% RH
Humidity-
Response Time
30 sec
Measured-
Temperature Range
-30 °C to 80 °C
Temperature Accuracy 25 ºC±0.5 ºC
Power Voltage 12 V to 24 V DC (Operating voltage range: 10 V to 30 V DC)
Power Consumption 400 mW max. - 400 mW max. -
Current Consumption - 5 mA DC max.  - 5 mA DC max. 
Output Signal 4 mA to 20 mA DC 1 V to 5 V DC 4 mA to 20 mA DC 1 V to 5 V DC
Load Resistance 300 Ω max. 100 kΩ min. 300 Ω max. 100 kΩ min.
Storage Temperature -30ºC to 80ºC (no condensation)
Storage Humidity 95% RH max. (no condensation)
Breakdown Voltage 500 V AC, 50/60 Hz for 1 min (Between live parts and casing)
Insulation Resistance 50 MΩ or more, at 500 V DC megger (Between live parts and casing) 
Vibration Resistance Durability: 10 to 55 Hz, Double amplitude: 1.5 mm in X-, Y-, and Z-direction, each 2 hours (Device not powered)
Shock Resistance Durability: 500 m/s² (Approx. 50G) in X-, Y-, and Z-direction, each 3 times (Device not powered)
Ingress Protection Class IP64
Case Material Polycarbonate
Cable ø4, 4-core round cable (oil/heat resistant), Conductor cross section: 0.3 mm², Length:1 m
Weight Approx. 33 g

Graph Plots of Characteristics (Typical Examples)

Temperature-Characteristics.gif


Humidity-Characteristics.gif

*For other detailed specifications, refer to the specification sheet of the corresponding model.

 

Dimensions / Output Circuit

Dimensions

Dimensions_RHT.gif

Output Circuit

Output-Circuit_RHT.gif

Precautions during use

Precautions during use

  • To maintain accuracy of the sensor, recommended storage is as follows:
            Temperature Range: 10 ºC to 50 ºC
            Humidity Range: 20 % to 60 % RH
    Do not use antistatic polyethylene bags (light blue, pink or rose pink color)
  • The value of relative humidity depends strongly on temperature.
    When measuring ambient temperature/humidity,
    be sure that there are no components generating heat at or near to the sensor mountings.
  • Use M3 pan head screws for mounting.
    The tightening torque for the case should be 0.32 Nm.
  • Be sure not to bend the sensor cables in the vicinity of the sensor.
  • For other precautions during use, refer to the General Precautions for temperature/humidity sensors.

*After you have put an item in your shopping cart, choose either [Quote] or [Order].
*For customized products or specifications, contact us using "Inquiry."
*Choose the currency from JPY, USD, or EUR.

Model Name Humidity precision Standard Price Inventory Type Select
RHT-20A ± 3 %
5,560 JPY
52 USD
49 EUR
BTO
RHT-21A ± 2 %
7,160 JPY
67 USD
63 EUR
BTO
Model Name Humidity precision Standard Price Inventory Type Select
RHT-20V ± 3 %
5,090 JPY
48 USD
45 EUR
BTO
RHT-21V ± 2 %
6,660 JPY
62 USD
58 EUR
BTO

STD Shipping is available immediately (on the day of order)

WIP Shipping is available within 1 to 3 weeks

BTO Shipping is available within 4 to 10 weeks

NOTE: The above information shows the typical delivery time. For actual delivery time, please confirm us as it depends on our business days and/or product quantities.

In the case of the quote request and order, please be sure to check the Terms and Conditions.
If you have made the procedure of quote request and order, it assumes that agree to the Terms and Conditions.

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Temperature and humidity sensor

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