TGR Recessed Dual Toxic Gas

Higher Reliability, Faster Installation, Superior Accuracy | Sense the Difference
Choose from 14 gases: CO/NO2, combustibles, refrigerants and most A2L & A3 gasses
Choose Modbus RTU and BACnet MS/TP protocols or Analog output
Field replaceable factory-calibrated sensing elements
Integrated LED indicator, audible alarm, and two configurable relay outputs

  • NEW! Configure and update firmware with the SenvaSync app
  • Single or dual sensors on each unit. (refrigerant sensors may only be single element units)
  • Choose from up to two gases, supporting CO, CO2, NO2, CH4, C3H8, H2, O2. H2S, NH3, refrigerants and most A2L & A3 gasses
  • Field-replaceable, digital factory-calibrated elements automatically adjust set-point and alarm thresholds for easy installation
  • Dual analog outputs support daisy chain wiring to cost-effectively sense and control large areas
  • Standard setpoint relay for direct fan control or daisy chain for central alarm activation eliminates need for costly controllers
  • Rugged enclosure is unobtrusive, and tamper resistant for both surface or recessed j-box
  • 7-year limited warranty on electronics; 2-years on sensor elements
  • Calibration certificate included with every sensing element to facilitate fast commissioning
  • UL listing for element only, UL2034 recognized electrochemical CO sensing element

Ask for a quotation

Senva TGR Series sensors can be ordered as individual CO or NO2 sensors or as a combination CO/NO2 sensor in a shared enclosure. Choose up to two from a variety of refrigerant gases, combustibles, or Carbon Monoxide for a combination of air quality and toxic gas detection. 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 a programmable fan relay, LED indicators, integrated display and audible alarm.

  • Monitor and alert occupants of dangerous air
  • Ensure adequate air flow in occupied spaces
  • Alert occupants of elevated gas levels
  • Directly control exhaust fans
  • Parking lot CO/NO2 combo
  • Leak detection for VRV refrigerant systems
  • Monitor spaces heated by gas RTUs

Power Supply

Comms
Analog

16-30VDC/24VAC(1), 5W max, 200mA max.
12-30VDC/24VAC(1), 5W max, 200mA max.

Wiring

Conductor
Terminal Torque

14-24 AWG, Minimum 600V, 75oC
0.5 N•m

Outputs (Analog)

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
Temp Output Scaling (optional)

0-10V, 0-5V, and 4-20mA(2) (selectable)
0-200ppm (default), 0-500ppm (menu selectable)
0-10ppm (default), 0-10ppm (menu selectable)
0-10,00ppm (default), 0-10,00ppm (menu selectable)
0-50% LEL (default), 0-50% LEL (Menu Selectable)
0-25% Vol (default), 0-25% Vol (menu selectable)
0-1000ppm (default), 0-1000ppm (menu selectable)
0-100ppm (default), 0-100ppm (menu selectable)
0-100ppm (default), 0-100ppm (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

Trouble Relay

Trouble Relay characteristics

N.C. 1A@24VAC/30VDC (50/60Hz) (no mains connection)

Alarm Relay

Alarm relay characteristics

N.O. 1A@24VAC/30VDC (50/60Hz) (no mains connection)

LED

Green, Yellow, Red

Green = Normal, Yellow = Warning, Red = Alarm

Audible Alarm Exposure

85dB Piezo transducer

30 minutes above alarm setpoint per UL2075; tamper-proof silence/reset button (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(4) ±5%of reading above 20ppm
0.1ppm
>7 years
Annual
3 to 6 feet; coverage 5000-7500 sq ft.

Carbon Dioxide (CO2)

Type
Accuracy (5)
Drift with ABC disabled (6)
Range
Response time
Sample rate
Recommended Height
Resolution
Life expectancy

Non-Dispersive Infrared (NDIR)
±(30ppm +3% of reading) (400-2000ppm), @-10-50°C
±(50ppm +5% of reading) Standard (2000-5000ppm), @-10-50°C
±(50ppm+3% of reading) Dual Channel (2000-5000ppm), @-10-50°C
±(100ppm+10% of reading) (5000-10000ppm), @0-50°C
35ppm/month (6) (Standard) 5ppm/month (6) (Dual Channel)
0-2000/5000ppm; Programmable up to 10,000ppm
30 s
1 s
3 to 6 feet; coverage 5000-7500 sq ft.
1 ppm
15 years

Methane/Propane / Hydrogen Sensor Performance

Type
Detection Range
Accuracy
Resolution
Life expectancy
Recommended Calibration
Recommended Height

Catalytic
0-50% LEL (Lower Explosive Limit)
5% of range
1%LEL
>5 years
Bump test annually, calibrate or replace if necessary (12)
Hydrogen/Methane: 0.5 to 1 foot from ceiling; coverage 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

Electrochemical
0-25% Volume
±5% of range
0.1%
5 years
Annual
3 to 6 feet; coverage 5000-7500 sq ft

H2S Sensor Performance

Type
Detection Range
Accuracy
Resolution
Life expectancy
Recommended Calibration
Recommended Height

Electrochemical
0-100 ppm
±5% of range
1 ppm
5 years
6 months
3 to 6 feet; coverage 5000-7500 sq ft

Ammonia NH3 Sensor Performance

Type
Accuracy
Resolution
Life expectancy
Recommended Calibration
Recommended Height

Electrochemical
±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
R134A Sensitivity (6)
Other detectable gases (8)
Life expectancy
Recommended Calibration
Recommended Height
Max Elevation (9)

Electrochemical
0-25% Volume
1 ppm
@300ppm test gas: 450 ppm R410A, 425 ppm R407C, 400 ppm R404A, 370 ppm R22, 300 ppm R134A
R407A, R407F, R427A, R452B, R507, R448A, R449A, R422A, R422D, R452A, R513A, R514A, R32
>10 years (typical life expectancy 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.
2629 m (8625 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

Material
Dimensions
Rating

ABS/Polycarbonate
5.7”h x 3.0” x 1.8”d
IP20

Agency

Compliance

RoHS

(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)Extreme temperatures may affect accuracy when using 4-20mA outputs.
(3) Carbon Monoxide full scale is 1000ppm.
(4) Nitrogen Dioxide full scale is 30ppm.
(5) Accuracy of CO2 reading may be reduced at temperatures below 14ºF (-10ºC).
(6) Refrigerant sensor may only be ordered as a single element sensor. It cannot be combined with other sensors.
(7)R134A sensor is factory calibrated to R134A gas but may be used as a general purpose refrigerant sensor. Sensitivity to some other gases can be found in the installation manual. Actual response may vary depending on installation. For more accurate response to a specific gas, a unit may be field calibrated.
(8) These gases my be detected by the sensor but sensitivity curves are not available at this time.
(9) Refrigerant sensors have been tested to perform at this altitude. To maintain accuracy spec, a field calibration is recommended.

(10) It is not recommended to de-activate ABC (auto-calibration) except for continuously occupied spaces or greenhouses. Drift ratings may vary based on environment.

(11) 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.

(12) 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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