Posifa PGS6032-R / PGS6454-R A2L Refrigerant Sensors
Configurable A2L refrigerant measurement variants with manufacturer user manuals.
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.
Manufacturer Model & Approval Verification
Original manufacturer approval — PGS6032-R and PGS6454-R: Posifa reports UL Solutions recognition of the two A2L refrigerant detection components against UL 60335-2-40:2022 (4th ed.), Annex LL. This is refrigerant-leak sensor/component recognition for specified HVAC systems, not a universal ATEX/IECEx Ex-proof certificate. Check the UL recognition scope and final assembled appliance requirements.
Read original Posifa manufacturer statement / model data →
PGS6032-R versus PGS6454-R refrigerant
PGS6032-R and PGS6454-R are distinct A2L-refrigerant sensor variants; the manufacturer photograph specifically depicts a PGS6454 example. Confirm targeted refrigerant(s), leak threshold, response, supply and host signaling for the exact code. A2L measurement is not a universal flammable-gas calibration, and compliant HVAC safety shutdown behavior belongs to the finished detector/controller assembly under the relevant standard.
PGS6032-R and PGS6454-R — UL-recognized A2L detection candidates
| Model / criterion | Maker source data | Engineering / QA consequence |
|---|---|---|
| Recognized types | PGS6032-R and PGS6454-R are the specifically named UL-recognized models under the manufacturer’s 2025 statement | The recognized scope is the refrigerant detection system sensor requirements in UL 60335-2-40:2022 4th edition, Annex LL; no unrelated zone approval inferred. |
| Refrigerants | PGS6000 OEM family targets A2L R32 / R454B in air | Verify factory programmed target gas. Percent LFL is refrigerant-specific; ppm, volume % and NLFL registers cannot be interchanged. |
| Sensing and compensation | Physical MEMS thermal conductivity with RH and barometric compensation, chip response below 250 ms | A real detector assembly with enclosure/flow path and controls has separate end-to-end T90 response. |
| Digital controller | RS485 Modbus RTU supported by the family; OEM evaluation software shows alarm, error, concentration and lifetime register concepts | Do not copy a default slave address or threshold from another firmware release without the exact model and revision manual. |
| Procurement and approvals | A2L detection requires matched sensor SKU, calibrated alarm threshold, installation position and fail-safe logic | Check UL recognition file, qualified refrigerant, sensor environment, orientation, firmware and full HVAC equipment safety standard. |
Qualification notes
The page’s photograph depicts PGS6454 only; do not relabel it as a PGS6032-R image. The UL recognition is not blanket certification of the finished HVAC refrigerant leak detection and mitigation system. Ex/IECEx approvals are not implied.
Official manufacturer references: Posifa UL-recognized model announcement · PGS6000 series platform and downloads.