Posifa PGS6000 A2L Refrigerant Leak Detection Sensor
MEMS thermal conductivity refrigerant leakage sensing device/platform.
Manufacturer: Posifa Technologies.
Original Data Sheet / Ordering Details
Posifa manufacturer model documentation index →
Check the specific model’s downloadable datasheet for measurement range, power, calibration and current ordering suffix.
Original producer family / ordering check
Posifa’s PGS6000 series is an OEM refrigerant detection platform; the manufacturer describes UL 60335-2-40/Annex LL recognition for specified PGS6032-R / PGS6454-R configurations. UL component recognition is not ATEX/IECEx approval for a finished hazardous-area instrument.
Posifa original product page and datasheet →
PGS6000 A2L detector module use
A MEMS thermal-conductivity refrigerant sensor depends on the detected refrigerant family, calibration algorithm and environmental response. Check the PGS6000’s actual compatible A2L refrigerant list, specified range and time response with the manufacturer; do not treat it as a universal Ex-proof gas detector. The host must distinguish normal zero, sensor fault, out-of-range and true leak conditions before controlling fans or compressors.
PGS6000 family — thermal-conductivity A2L sensing and ambient correction
| Model / criterion | Maker source data | Engineering / QA consequence |
|---|---|---|
| Measurement target | Mildly flammable A2L refrigerants R32 and R454B in air, not a generic combustible-gas ppm sensor | Refrigerant identity and composition affect thermal conductivity and require refrigerant-specific calibration. |
| Sensing element | Second-generation MEMS thermal conductivity die using a heat-transfer cavity suppressing natural convection | Unlike catalytic beads, physical gas conduction rather than combustion is the primary method. |
| Compensation and interface | Humidity sensor and barometric sensor assist mixture correction; RS485 Modbus RTU supported | Confirm gas concentration units, alarm/fault registers, bus address and poll rate for actual PGS6032-R/PGS6454-R order. |
| Response and working conditions | Manufacturer lists detection element response below 250 ms; absolute max operating −40…+85°C and supply 5.5 VDC | Do not confuse fast chip signal response with leak-detector inlet and system shutdown latency; 5.5V is absolute maximum, not nominal supply. |
| Reliability and approvals | Advertised lifetime over 15 years; specific sensor models recognized by UL for UL 60335-2-40:2022 Annex LL | Manufacturer recognition is model/standard specific and does not certify a full heat pump’s protective controls or any general ATEX/IECEx environment. |
Qualification notes
An integrated A2L mitigation design requires leak alarm threshold in the chosen refrigerant’s LFL units, fault handling, ventilation/fan response and revalidation after component replacement. Certification must be traced to the precise PGS model and certificate, not the generic PGS6000 family.
Official manufacturer references: Posifa PGS6000 family technical page · Posifa specific Annex LL recognition statement.