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KHT series are temperature and humidity sensor which adopts advanced and imported macromolecule humicap as humidity measuring component and Pt resistance as temperature sensitive competent. The controller can change environmental temperature and humidity to standard current and voltage corresponding. The features of sensor are small volume, light weight, high-precision measuring, prompt response speed and long time stability. The sensor can be used widely for all kinds of areas measuring and controlling the environmental temperature and humidity in meteorology, ministry defense, scientific research, post and telecommunication, tobacco, chemicals, environmental protection, archives conservation, materials storage in medical health, hotel and food, fruit fresh, senior building etc.
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Order Code
¡ô KHT-WI/A (B): wall mounted/temperature, humidity (current output), temperature and humidity type
¡ô KH-WI/A (B): wall mounted/ humidity (current output), only humidity type
¡ô KT-WI/A (B): wall mounted/temperature (current output), only temperature type
¡ô A: temperature range:0-50¡æ B:temperature range:20-80¡æ
2. Specification
¡ô Power: 12VDC-24VDC
¡ô Usage range
Temperature:0-50¡æ or -20 80¡æ
Humidity: 0-10 RH%
¡ô Storage
Temperature:0-50¡æ or -20 80¡æ
Humidity: 0-10 RH%
¡ô Humidity transmission range:0-100%RH
¡ô Humidity accuracy:¡À2%RH or below
¡ô Humidity output singal:4-20Ma(humidity ange:0-100%RH)
(Reference) at 25 deg.C
Humidity 20 30 40 50 60 70 80 90
(%RH)
Current 7.2 8.8 10.4 12.0 13.6 15.2 16.8 18.4
output
Temp. -20 -10 0 10 20 30 40 50 60 70 80
(deg.c)
Output 4 5.6 7.2 8.8 10.4 12 13.6 15.2 16.8 18.4 20
(ohm)
¡ôTemperature sensitive components: Pt resistance: ¡°HONEYWELL¡± Pt1000
3. Standard test Conditions
¡ô Test Conditions
Environment: normal temperature25¡æ, without strong electromagnetic interference
¡ô Test Ways
-Humidity: when put the sensor in 0%RH humidity for 30 minutes, then in 10%RH for 15 minutes; the test humidity output., then up to 95%RH accordingly, by per10%RH; then reducing to 10%RH;test
circurely.Voltage:12VDC or 24 VDC.
-Temperature: 0-50¡æ or increasing or reducing temperature equally, by? 5¡æ.Power voltage: 12VDC or 24VDC.
4. Test Instrument
1) Temperature and humidity generator: high-precision constant temperature and humidity test chamber.
2)Standard£ºGE company photoelectric dew-point hygrometer
3) Ammeter: Hp Company, Six semi-multimeter accuracy 0.01mA
5. Reliability Test
No, Item, Way, Requirement
1) Impact test: make the sensor fall free form one meter height to hard wood flooring three times. If the
sensor is without be broken or destroy, the electrical property is ok.
2) Vibrating test: vibrating in X-Y-Z axis for 30 seconds, Frequency with 10-55 HZ, Range: 1.5mm, if the
sensor is without being broken or destroy, the electrical property is ok.
3) Heating test: put the sensor in constant temperature 55¡æ and humidity 3%RH for 1000 hours, accuracy£º
¡À3%RH
4) High humidity: put the sensor in temperature 40 ¡æ and humidity 95% for 1000 hours, accuracy:
¡À3%RH
5) Temperature test circularly: 300 times circulation. Put in -10 ¡æ for 1 hour per circulation; then up to
55 ¡æ and put for 1 hour; then continue another one circulation. accuracy£º¡À3%RH/¡À0.5¡æ.
Remarks:
1) All datas are based on the temperature and humidity changing range: with 80%RH
2) After each test, the sensor should be put in normal environmental temperature and humidity for 24 hours and then continue another test.
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