Telaire Ventostat TR

• Multi-measurement capabilities:
- Carbon Dioxide (CO2) - Patented, Absorption
infrared (IR) gas sensing engine provides high
accuracy with dynamic pressure compensation
- Hydrogen (H) - Pre-calibrated, cutting edge
technology
- Relative Humidity (RH)
- Temperature

-Pressure
• Mounting plate with two-piece terminal blocks allows for quick, easy wiring
• Standard Modbus output enables local and remote monitoring
• Relays - Output with programmable setpoints
• Sensors are shipped factory-calibrated
• Two-piece design allows unit to be replaced without the need for rewiring
• Modbus RTU Output

Transmitter                                                                                                     
Power Supply Requirements
• 18-30 VAC RMS, 50/60 Hz, or 11-42 VDC
• Polarity protected
Power Consumption
• Typical 0.8 W at nominal voltage of 24V AC RMS
Operating Conditions
• 32°F to 122°F (0°C to 50°C)
• 0 to 95% RH, non-condensing
Storage Conditions
• -40°F to 158°F (-40°C to 70°C)
Flammability Classification
• UL94 5VA
Modbus
• RTU

• Baud rates 38400 or 9600

• Additional programmable baud rates available.

Enclosure
• Standard modern wall-mount enclosure
Relay (Hydrogen Response)
• Normally open and normally closed contact
Relay Set-points and Hysteresis
• Adjustable set-points allow you to match application
Rated Load (Typical)
•  250V, 120mA, 35Ω, 1-Form-C solid state relay

Certifications
• CE and RoHS, REACH, and WEEE compliant, UL 9540
Warranty
• 12 months on mechanical defects

Carbon Dioxide (CO2)
Sensing Method 
• Non-dispersive infrared (NDIR) absorption
• Gold-plated optics
CO2 Measurement Range
• 0 to 50000 ppm
CO2 Accuracy
• ±10% of reading
Temperature Dependence
• 0.2% FS per °C (±0.11% per °F)
Stability
• <5% of FS or <10% reading annual over life of sensor (10 years)
CO2 Warm-up Time
• < 2 minutes (operational)
• 10 minutes (maximum accuracy)
Relative Humidity (RH) and
Temperature
RH Sensing Element
• Capacitive polymer sensor
RH Range
• 0% to 99% RH (non-condensing)
RH Accuracy (25°C)
• ±2.5% RH (20 to 80% RH)
• ±3.5% RH (<20% and >80% RH)
Active Temperature Accuracy
• ±0.8°C @ 22°C
Active Temperature Range
• 32°F to 122°F (0°C to 50°C)
Hydrogen (H)
Range
• H2 Sensing Element: 0 - 160,000 ppm
Accuracy
• ±5% of full scale or ±8000 ppm
Warm-up Time
• < 1sec

Pressure

Pressure Sensing Element

•  MEMS based sensor

Absolute Pressure Range

• 50kPa to 200kPa

Pressure Accuracy

•  ± 2.0% FSO

AX222120