TG UL CO & NO2

Higher Reliability, Faster Installation, Superior Accuracy | Sense the Difference
Individual UL2075 Recognized CO, NO2, or dual sensing elements in one enclosure.
BACnet/Modbus or Analog ouput models.
Operates as a sensor or stand-alone controller.
Standard LCD with intuitive set up menu.

  • NEW! UL2075 Recognized CO and NO2 elements.
  • NEW! Fail-open relay option
  • Supports BACnet MS/TP and Modbus RTU networks.
  • Integrated display, LED indicators, audible alarm.
  • Analog menu selectable 0-5/10V, 1-5V and 4-20mA outputs (0-10V default).
  • Analog version supports daisy chain wiring to cost-effectively sense and control large areas.
  • Sensor self-test feature for added safety and reliability.
  • Temperature compensated elements for maximum accuracy.
  • UL listed and LADBS Approved (City of LA).
  • Warning indicators alert occupants when element’s lifecycle is near end for replacement.
  • Field replaceable sensing elements; 7 year life expectancy on CO and NO2 elements.
  • Complies with IMC 404.2.1, UMC 403.7.2, and NFPA 720.
  • NEW! TG-REM kit allows for dual mounting heights with a single power source and output connection.
  • Great for local codes requiring CO and NO2 at different heights
  • Plug-and-play; provided with pre-cut CAT-5 cable
  • Single power source, single location for RS-485/analog/relay connections
  • Single BACnet device; reduce devices/points on your network
  • Through-the-back wiring makes junction-box-mounting easy
  • No programming necessary

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Senva UL Listed TG Series sensors can be ordered as individual CO or NO2 sensors or as a combination of CO&NO2 sensors in a shared enclosure. CO and NO2 sensor components are listed to UL2075. The analog output model features 2 outputs that support daisy chain wiring - multiple sensors may be used in a parallel sequence (0-10V) for cost effective coverage of large areas. The unit can also act as a stand alone controller, utilizing the relay for exhaust fan operation or the output for direct control of a VFD. The BACnet/Modbus model supports BACnet MS/TP & Modbus network communication in one unit. Standard features include network auto-configuration, a programmable fan relay, LED indicators, integrated display and audible alarm.
  • Ensure adequate air flow in occupied spaces.
  • Ideal for parking lot garages.
  • Monitor multiple toxic gases with one mounted unit.
  • Alert occupants of elevated gas levels.
  • Directly control exhaust fans.

Power Supply

TG-REM

15-30VDC/24VAC(1), 4W max, 160mA max.
Powered through CAT-5 cable, no separate power required.

Wiring

Conductor
Terminal Torque

14-24 AWG, Minimum 600V, 75oC
0.5 N•m

Analog Outputs

2 programmable outputs
CO output scaling
NO2 output scaling
CO2 output scaling
Propane/Methane / Hydrogen Output Scaling
Oxygen Output Scaling
Refrigerant Output Scaling
H2S Output Scaling
Ammonia NH3 Output Scaling
Temperature output scaling

0-10V (default), 0-5V, 1-5V and 4-20mA (menu selectable)
0-200ppm (default), 0-1000ppm (menu selectable)
0-10ppm (default), 0-30ppm (menu selectable)
0-1000 ppm (default), 0-1000 ppm (menu selectable)
0-50% LEL (default), 0-50% LEL (menu selectable)
0-25% Vol (default), 0-25% Vol (menu selectable)
0-1000 ppm (default), 0-1000 ppm (menu selectable)
0-100 ppm (default), 0-100 ppm (menu selectable)
0-100 ppm (default), 0-100 ppm (menu selectable)
-20 to 85°C

BACnet /Modbus

Protocol RS-485
Baud Rates
RS-485 Loading

BACnet MS/TP, Modbus RTU, Modbus ASCII
9600, 19200, 38400, 57600, 76800, 115200
1/4 unit

Fan Relay

Fan relay characteristics (Standard Version)
Fan relay characteristics (Fail-Open Version)
CO fan relay setpoint
NO2 fan relay setpoint

N.C. 1A@24/30VDC (50/60Hz) (no mains connection)
N.O. 1A@24/30VDC (50/60Hz) (no mains connection)
25ppm (default), 0-1000 ppm (menu selectable)
1ppm (default), 0-30ppm (menu selectable)

Alarm Relay

Alarm relay characteristics (Standard Version)
Alarm relay characteristics (Fail-Open Version)
CO alarm relay setpoint
NO2 alarm relay setpoint

N.C. 1A@24/30VDC (50/60Hz) (no mains connection)
N.O. 1A@24/30VDC (50/60Hz) (no mains connection)
100ppm (default), 0-1000 ppm (menu selectable)
3ppm (default), 0-30ppm (menu selectable)

Display

3-1/2 digit LCD

Indicates CO ppm, NO2 ppm (menu selectable)

LEDs

Green, Yellow, Red

Green = Normal, Yellow = Warning/Fan Relay, Red = Alarm/Alarm Relay

Audible Alarm
Exposure

85dB Piezo transducer

30 minutes above alarm setpoint per UL2075
(menu selectable)

CO Sensor Performance

Type
Accuracy
Resolution
Certifications
Life expectancy
Recommended Calibration
Recommended Height and Coverage Area

Electrochemical
±5% of default range(2), ±5%of reading above 200ppm
1ppm
UL2075 Recognized Component
>7 years
Annual
3 to 6 feet, coverage 5000-7500 square feet (Click for details)

NO2 Sensor Performance

Type
Accuracy
Resolution
Certifications
Life expectancy
Recommended Calibration
Recommended Height and Coverage Area

Electrochemical
±5% of default range(3) ±5%of reading above 20ppm
0.1ppm
UL2075 Recognized Component
>7 years
Annual
3 to 6 feet, coverage 5000-7500 square feet (Click for details)

Carbon Dioxide (CO2)

Type
Accuracy(4)
Drift with ABC Disabled (5)
Resolution
Life Expectancy
Response Time
Sample Rate
Recommended Height and Coverage Area

Non-Dispersive Infrared (NDIR)
±(30ppm +3% of reading) (400-2000ppm), @-10-50°C
±(50ppm +5% of reading) Standard (2000-5000ppm),
±(50ppm+3% of reading) Dual Channel (2000-5000ppm),
±(100ppm+10% of reading) (5000-10000ppm)
35 ppm / month (6) (Standard), 5 ppm / month (6) (Dual-Channel)
1 ppm
15 years
30s
1s
3 to 6 feet, coverage area 5000-7500 square feet (Click for details)

Methane/Propane / Hydrogen Sensor Performance

Type
Detection Range
Accuracy
Resolution
Certifications
Life Expectancy
Response Time
Recommended Calibration
Long Term Stability Drift
Recommended Height and Coverage Area

Catalytic
0-50% LEL (Lower Explosive Limit)
±5% of Range
1% LEL
UL2075 Recognized component for Methane/Propane
>5 years
<10s to 90%
Bump test annually, calibrate or replace if necessary. (9)
Zero: <±2mV/year
Sensitivity: <±2mV/month
Hydrogen/Methane: 1 foot from ceiling, coverage area 5000-7500 sq. ft.
Propane: 1-3 ft. above finished floor, coverage area 5000 sq. ft.

Oxygen Sensor Performance

Type
Detection Range
Accuracy
Resolution
Life Expectancy
Recommended Calibration
Recommended Height and Coverage Area

Electrochemical
0-25% Volume
±5% of Range
0.1%
5 years
Annual
3 to 6 feet, 5000-7500 sq. ft.

H2S Sensor Performance

Type
Detection Range
Accuracy
Resolution
Life Expectancy
Recommended Calibration
Recommended Height and Coverage Area

Electrochemical
0-100 ppm
±5% of Range
1 ppm
5 years
6 months
3 to 6 feet, coverage area 5000 - 7500 sq. ft.

Ammonia NH3 Sensor Performance

Type
Detection Range
Accuracy
Resolution
Life Expectancy
Recommended Calibration
Recommended Height and Coverage Area

Electrochemical
0-100 ppm
±5% of Range
0.1 ppm
5 years
6 months
0.5 to 1 foot from ceiling, coverage 5000 - 7500 sq. ft.

Refrigerant Sensor Performance

Type
Detection Range
Resolution
R22, R134A, R410A, R404A, R407C
R134 Sensitivity (7)
Other Detectable Gases (8)
Life Expectancy
Recommended Calibration
Recommended Height and Coverage Area

MOS
0-1000 ppm
1 ppm
Calibrated for respective gas.
@ 300 ppm test gas: 450 ppm R410A, 425 ppm R407C, 400 ppm R404A, 370 ppm R22, 300 ppm R134A
R407A, R407F, R427F, R452B, R507, R448A, R454B, R455A, R455C, R422A, R422D, R452D, R514A, R32. Consult factory for other A2L gases.
10 years (typical expectation for MOS sensors)
6 months
6 inches above floor, no more than 18 inches above lowest level of equipment location for leak detection, coverage 5000 - 7500 sq. ft.

Operating Environment

Temperature, Continuous
Humidity
Max Elevation

-20 to 50oC (-4 to 122oF) (CO2 versions rated to -40oC)
15-95% continuous, 0-95% intermittent
2000m

Enclosure
(Wall & Duct)

Material
Dimensions
Conduit Opening
Rating

ABS/Polycarbonate
4.0”h x 4.4”w x 2.1”d (+6.8” probe for duct version)
Tapped 1/2” NPT
IP43 or NEMA 3R

Enclosure
(Metal)

Material & Enclosure Rating
Dimensions
Opening
Mounting
Rating

Powder-coated steel
5.0”h x 4.3”w x 2.25”d
Dual air vents on front lid of enclosure
Pre-drilled for 2x4” electrical box
IP41 or NEMA 3R

Agency

Compliance

UL61010-1 Listed UL, cUL, CE, UL2075 Recognized CO and NO2 elements

(1) One side of transformer secondary is connected to signal common. Dedicated transformer is recommended. No mains circuit connection allowed. In addition, it is required to use an isolated power supply that is certified by a national or international standard (i.e. UL). Use of a Class 2 LPS power supply or greater is required.
(2) Carbon Monoxide full scale is 1000ppm.
(3) Nitrogen Dioxide full scale is 30ppm.
(4) Accuracy of CO2 reading may be reduced at temperatures below 14ºF (-10°C). CO2 sensor is equipped with a heater to account for temperatures down to -40°C.
(5) It is not recommended to de-activate ABC (auto-calibration) except for continuously occoupied spaces or greenhouses. Drift ratings may vary based on environment.
(6) Combination CO/Methane, Co/Propane, or CO/Refrigerant sensors should be mounted according to Propane/Methane/Refrigerant recommendations. Consult factory for other combinations. Mounting height recommendations may be adjusted according to installation. Ensure sensor is accessible for maintenance and target gas has unobstructed access to sensor. Mount in accordance with ANSI/NFPA 70 and NEC or CEC.
(7) R134A sensor may be used as a general purpose refrigerant detection. The sensor's response to other refrigerants will change proportionally as shown in the following app note: https://www.senvainc.com/catalog/documents/downloadcenter/Refrigerant%20cross%20sensitivities.pdf Actual response may vary depending on installation. For more accurate response to a specific gas, a unit may be field calibrated.
(8) These gases may be detected by the sensor but sensitivity curves are not available at this time.
(9) A bump test involves exposing the sensor to a reference gas and detecting the sensor’s response. If sensor response is out of accuracy range, recalibration or replacement of the sensor element may be necessary.

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