HTM25X0LF Measurement Specialties, HTM25X0LF Datasheet

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HTM25X0LF

Manufacturer Part Number
HTM25X0LF
Description
Temperature And Relative Humidity Module
Manufacturer
Measurement Specialties
Datasheet
HTM25X0LF – Temperature and Relative Humidity Module
DESCRIPTION
Based on the rugged HTS2230 humidity / temperature sensor, HTM25X0LF is a dedicated humidity and
temperature transducer designed for OEM applications where a reliable and accurate measurement is needed.
Direct interface with a micro-controller is made possible with the module’s humidity linear voltage output.
FEATURES
APPLICATIONS
HTM250XLF HPC169 Rev 0
Full interchangeability
High reliability and long term stability
Not affected by water immersion
Ratiometric to voltage supply
Suitable for 3 to 10 Vdc supply
voltage
Industrial
Process control
Hygrostat
Data logger
Humidity Sensor Specific Features
Temperature Sensor Specific Features
www.meas-spec.com
Instantaneous de-saturation after long periods in saturation
phase
Fast response time
High resistance to chemicals
Patented solid polymer structure
Stable
High sensitivity
Hermetic Housing
Humidity calibrated within +/-2% @55%RH
Temperature measurement through NTC 10kOhms +/-
1% direct output
Small size product
Typical 1 to 4 Volt DC output for 0 to 100%RH at 5Vdc
1/9
July 2009

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HTM25X0LF Summary of contents

Page 1

... HTM25X0LF – Temperature and Relative Humidity Module DESCRIPTION Based on the rugged HTS2230 humidity / temperature sensor, HTM25X0LF is a dedicated humidity and temperature transducer designed for OEM applications where a reliable and accurate measurement is needed. Direct interface with a micro-controller is made possible with the module’s humidity linear voltage output. ...

Page 2

... HTM25X0LF – Temperature and Relative Humidity Module PERFORMANCE SPECS MAXIMUM RATINGS Ratings Symbol Storage Temperature Storage Humidity RHstg Supply Voltage (Peak) Humidity Operating Range Temperature Operating Range Peak conditions: less than 10% of the operating time NOMENCLATURE HTM25X0LF Output Temperature Sensor: ELECTRICAL CHARACTERISTICS (Ta=23° ...

Page 3

... RH = -1.92E Vout + 1.44E with Vout in mV and • Measurement Conditions HTM25X0LF is specified for accurate measurements within 10 to 95% RH. Excursion out of this range (<10% or >95% RH, including condensation) does not affect the reliability of HTM25X0LF characteristics. HTM25X0LF HPC169 Rev 0 RH (%) Vout (mV) RH (%) ...

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... HTM25X0LF – Temperature and Relative Humidity Module • Error Budget at 23°C HTM25X0LF Error Limits: Temperature coefficient compensation: RH HTM25X0LF Linearity Error: Non-linearity and temperature compensation: − 9206 = % RH All equations Vout in mV and Ta in °C HTM25X0LF HPC169 Rev × − − ...

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... HTM25X0LF – Temperature and Relative Humidity Module HTM2500LF TEMPERATURE SENSOR: DIRECT NTC OUTPUT • Typical temperature output Depending on the needed temperature measurement range and associated accuracy, we suggest two methods to access to the NTC resistance values. The exponential relation only roughly describes the actual characteristic of an NTC thermistor can, however, as the material parameter β ...

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... HTM25X0LF – Temperature and Relative Humidity Module • Steinhart-Hart coefficients According to the equation below, the Steinhart-Hart coefficients for the operating temperature range for HTM2500LF thermistor are: • Temperature Interface Circuit Concerning the temperature sensor of the HTM2500LF, the following measuring method described below is based on a voltage bridge divider circuit ...

Page 7

... HTM25X0LF – Temperature and Relative Humidity Module HTM2530LF TEMPERATURE SENSOR: VOLTAGE OUTPUT Concerning the temperature sensor of the HTM2530LF built as the HTM2500LF temperature sensor interface circuit. The voltage bridge divider circuit is internal. It uses only one resistor component (Rbatch design HTM2530LF temperature sensor interfacing circuit. ...

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... SPECIFIC PRECAUTIONS • HTM25X0LF is not protected against reversed polarity - Check carefully when connecting the device. • If you wish to use HTM25X0LF in a chemical atmosphere not listed above, consult us. PACKAGE OUTLINE Weight: 17.5g Wire characteristics: AWG 24 for W1, W2, W3 and W4 / AWG 22 for W5 HTM25X0LF HPC169 Rev 0 ...

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... HTM25X0LF – Temperature and Relative Humidity Module ORDERING INFORMATION HPP809A031 : HTM2500LF – HUMIDITY VOLTAGE OUTPUT + NTC (TEMPERATURE DIRECT OUTPUT) HPP809A032 : HTM2530LF – VOLTAGE OUTPUT FOR HUMIDITY AND TEMPERATURE (MULTIPLE PACKAGE QUANTITY OF 10 PIECES) Revision Comments 0 Document creation The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for inaccuracies ...

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