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VRF Refrigerant Leak Detector for Occupied Space

Non-Dispersive Infrared (NDIR) Technology

The Most Reliable and Cost Effective Solution in the Market

Key Features:

  • R-410A, R-407C, R-404A, R-32, A2L and other halogenated gasses upon request
  • Lowest lifetime total cost – 5+ year expected lifetime (IR source). 2 year warranty.
  • 5 seconds complete unit functionality test.
  • Fits in standard 2 gang PVC junction Box.
  • Onboard diagnostics with unit fault alarm.
  • Available in 24Vac and 120Vac.
  • Can be easily calibrated for available and under development refrigerant gases.
  • Optional Modbus RS485 communications.
  • No need for yearly calibration or service.

SensAC VRF Refrigerant leak detector with NDIR sensor technology meets the need for a cost-effective and reliable solution to continuously monitor occupied space where there is a potential risk of refrigerant gas accumulation coming from high-tonnage, high-volume VRF system gas leaks. Typical application are hotel rooms, senior care, dorms, hospital and other occupied spaces, in both, new construction and retrofits taking advantage of the cost-savings benefits of VRF technologies for heating and cooling.

SensAC VRF Refrigerant leak detector comes standard with 2 alarms threshold for gas concentration to activate two onboard relays that can be used to isolate/shut refrigerant supply lines, activate exhaust fans, open doors or windows,  alert occupants and communicate to a Building Management System. 

SensAC provides onboard diagnostics with unit fault along with real-time system & alarm status, gas concentration, and settings through the onboard Modbus RS485 communications interface.

Typical Applications

  • Hotels
  • Hospitals
  • Senior Living
  • Dorms
  • Office space
  • Retail
  • Schools
  • Historic Buildings
  • Multi-Family
  • Restaurants
  • Hospitality
  • Child Care Facilities

SensAC VRF Refrigerant Leak Detector

Sensing Element                                                 Non Dispersive Infrared (NDIR)

Detectable Gases                                               R410A

Supply Voltage                                                    120 Vac or 24 Vac/dc, 60Hz

Power Consumption                                          44 mA @ 120VAC (27VA)

Relay Output                                                        Two SPDT (Form C) Dry Contacts 1.0A max. @ 24 VDC

Alarm Relays Actuation                                    Relay 1 & 2 at 2000 ppm

Multicolor Status LED Indication                     Green Blinking:           Warmup
                                                                               Green Fixed:                Normal status
                                                                               Yellow:                          Fault
                                                                               Red Blinking:               Alarm

Buzzer                                                                   83 dB at 10″ activated at 1000 ppm

Serial Communications                                   Modbus RS485,  slave

Installation Mounted                                         18″ from the floor, below the discharge of the fan coil.

                                                                               Fits in standard 2-gang PVC junction box.

Factory Calibration Range                              5000 PPM

Repeatibility                                                       ± 5% full-scale range under 50% full-scale,

Operating Temperature                                  -4 to 140 F

Storage Temperature                                      -15 to 140 F

Relative Humidity                                              0-90 %RH non-condensing.

Warranty                                                             2 years.

IP Rating                                                              IP42

Approvals                                                           CE Mark, IEC 60355-2-40 Annex LL, EN 378-3,

                                                                              EN50676 and EN14624, ISO 5149-3,

                                                                              REACH/RoHS Compliant.

Product Dimensions                                        Width 5.11 in (13.0 cm), Height 5.11 in (13.0 cm), Depth 2.36 in (6.0 cm)

Available voltage

  • U4518R410A – 24VAC/DC
  • U4762R410A – 90-240 VAC

Available gases and thresholds

  • R410A Sensor, thresholds 1000 & 2000 ppm.
  • R4134A Sensor, thresholds 1000 & 2000 ppm.
  • R32 Sensor, thresholds 1000 & 2000 ppm.
  • R404A Sensor, thresholds 1000 & 2000 ppm.
  • R407A Sensor, thresholds 1000 & 2000 ppm.
  • A2L

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