Product Overview

T8700 Wall Mount Humidity and Temperature Transmitters by Telaire are precision instruments designed for HVAC control applications. They offer active and passive temperature sensor outputs, with field-selectable analog outputs including 0-5V, 0-10V, and 4-20 mA. Featuring a rugged capacitive sensor for 0-100% RH measurement with excellent response times, linearity, and stability, these transmitters are factory calibrated against NIST standards. The modern enclosure is available in display and non-display versions, with customized branding options. Installation is simplified with a two-piece mounting plate and terminal blocks, and enhanced field serviceability is provided by a replaceable humidity sensor tip module, minimizing downtime and calibration costs. The T8700 series is designed for reduced cost of ownership and offers a strong performance-to-price ratio.

Product Attributes

• Brand: Telaire
• Sensor Type: Capacitive polymer sensor (RH), NTC 10K W thermistor (Temperature)
• Enclosure Material: Flame retardant, UL-94V ABS plastic
• Certifications: CE, RoHS compliant
• Warranty: Two years (transmitter), one year (replaceable sensor)
• Customization: Customized branding available on request (subject to quantity)

Technical Specifications

Model	Size	Display	Humidity Output (4-20 mA)	Humidity Output (0-5 V)	Humidity Output (0-10 V)	Temperature Output (4-20 mA)	Temperature Output (0-5 V)	Temperature Output (0-10 V)	Temperature Sensor
T8700-E	Euro	No							Thermistor 10k II
T8700-E-D	Euro	Yes							Thermistor 10k II
T8700	US	No							Thermistor 10k II
T8700-D	US	Yes							Thermistor 10k II

Specification	Details
Sensing Method	Fully integrated humidity and temperature
Power Supply Requirements	18-30 VAC RMS, 50/60 Hz, or 18 to 42 VDC, polarity protected
Power Consumption	Typical 0.7 W at nominal voltage of 24V AC RMS
Temperature Dependence	0.2% FS per C (0.11% per F)
Operating Conditions	32F to 122F (0C to 50C); 0 to 95% RH, non-condensing
Storage Conditions	-40F to 158F (-40C to 70C)
Flammability Classification	UL94 5VA
Thermistor Type	NTC 10 K W thermistor (passive)
Thermistor Accuracy	1C (15 to 35C)
RH Sensing Element	Capacitive polymer sensor
RH Range	0% to 99% RH (non-condensing)
RH Accuracy (25C)	2.5% RH (20 to 80% RH); 3.5% RH (80% RH)
Active Temperature Range	0 to 50C
Active Temperature Accuracy	0.8C @ 22C
Output	Simultaneous 0 to 10 V (100 output impedance) and 4 to 20mA (RL maximum 500 )
Digital to Analog Error	1%
Replaceable Sensor Part Number	T63346