Freon Gas Sensor (Freon Gas Detector) — Fixed Monitoring for HVAC/R
Winsen® proizvaja fiksne Freon gas sensors for legacy “Freon” refrigerants (e.g., R12, R22*) and modern A1/A2L/A3 gases (R134a, R410A, R32, R454B, R1234yf/ze, R290, R600a). Choose Je n za ppm zgodnje opozarjanje oz MOS/DIR for %LEL safety interlocks. Standard 4–20 mA, RS-485 Modbusin relejni izhodi streamline BMS/PLC integration.
- A1 / A2L / A3 pokritost
- NDIR ppm & MOS %LEL
- OEM/ODM • Množična naročila
- Hiter dobavni rok
Model Guide — Select by Gas Family & Measurement
A1 HFC/HFO — NDIR PPM
- Ranges: 0–1,000 / 0–5,000 ppm (customizable)
- Izhodi: 4–20 mA, RS-485 Modbus, 1–2 releja
- T90 ≤ 30 s • Majhen zanos, dolga življenjska doba
*R22/R12 are legacy service gases in many regions.
A2L Low-GWP — NDIR PPM / %LEL
- PPM zgodnje opozorilo in/ali 0–100 % LFL/LEL
- 4–20 mA / RS-485 / releji
- Ideal for VRF/VRV rooms & heat pumps
A3 Vnetljivo — %LEL Varnost
- Razpon: 0–100 % LEL (NDIR-LEL ali MOS)
- Relays for ventilation & shutdown interlocks
- IP65 housings available
What “Freon” Means
In day-to-day language, people often say “Freon” to mean any refrigerant. Technically, Freon™ is a trademark historically used for certain CFC/HCFC/HFC products (e.g., R12/R22). On this page, “Freon gas sensor” refers broadly to electronic fixed sensors that detect refrigerant gas in HVAC/R spaces.
NDIR senzor hladilnega sredstva
Polprevodniški senzor hladilnega sredstva
Tehnološke možnosti
| tehnologija | Najboljše za | Razpon | Prednosti | Premisleki |
|---|---|---|---|---|
| NDIR (infrardeči) | A1 ppm; A2L ppm/%LEL | ppm → %LEL | High selectivity, low drift, not O₂-dependent | Zaščitite optiko pred kondenzom/prahom (filtri/ohišja) |
| MOS (polprevodnik) | A2L/A3 %LEL | 0–100 % LEL | Hiter odziv; robusten; stroškovno učinkovito | Possible cross-sensitivities; periodic calibration recommended |
| Katalitična kroglica | Splošni ogljikovodiki (A3) | 0–100 % LEL | Zrela tehnologija | Potrebuje O₂; se lahko zastrupi s silikoni/svincem |
Tipične aplikacije
VRF/VRV indoor units & hotel rooms
Montirajte nizko (~150–300 mm nad tlemi) v bližini notranjih enot in zbirališč. Predalarm → odzračevanje svežega zraka; glavni alarm → izklop ventilatorja/notranje enote.
Chiller & machinery rooms, compressor racks
Place near compressors, oil separators, valves, and floor low spots/sumps; use IP-rated housings and BMS interlocks.
Cold storage & refrigerated display cases
Install beneath cases and along manifolds/pipe runs; choose condensation-resistant designs and curtain/exhaust interlocks.
Podatkovni center v vrsti/CRAC enote
Position in return air, under raised floors, and near coils; ppm early warning protects uptime.
Heat pumps & general HVAC equipment
For A2L/A3, use %LFL tiers (~25% pre-alarm; ~50% main) to trigger ventilation and safe shutdown.
Osnovne specifikacije
| Parameter | Vrednost / možnost |
|---|---|
| Merjenje | NDIR ppm in/ali %LFL (MOS/NDIR-LEL) |
| Izhodi | 4–20 mA (2/3-žični), RS-485 Modbus RTU, 1–2 releja (N.O./N.C.) |
| Odzivni čas (T90) | ≤ 20–30 s tipično |
| Dobava | 12–24 VDC (drugi na zahtevo) |
| Pogoji delovanja | −20…+50 °C; 15–95 % RH brez kondenzacije (odvisno od modela) |
| Ohišja | Stena, plošča, kanal; ohišja do IP65 |
| Skladnost | CE & RoHS; designed for BMS/PLC integration |
Placement & Setpoints — Good Practice
- Montažna višina: Most refrigerants are heavier than air ⇒ mount low; confirm with on-site airflow.
- Pokritost: ~5–10 m polmera na senzor v odprtih prostorih; dodajte enote blizu ventilov/sklepov in nizkih žepov.
- Alarmi: A2L/A3: predalarm ≈25 % LFL; glavni ≈50 % LFL. A1: pasovi ppm (npr. 1.000–5.000 ppm) na specifikacijo projekta.
- Zapore: Pre-alarm → ventilation; Main → equipment shutdown + beacon/horn/BMS event.
Dokončajte mejne vrednosti in količine glede na specifikacijo vašega projekta in lokalne kode.
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Zahtevajte posvetovanje
Pogosta vprašanja — senzorji za freon
Is a Freon gas sensor the same as a refrigerant gas sensor?
In common usage, yes. “Freon” is often used generically for refrigerants. Our fixed electronic sensors detect the specified gas family regardless of branding.
Ali potrebujem ppm ali %LEL?
Use ppm (NDIR) for early-warning/comfort monitoring. Use %LEL (MOS or IR-LEL) to drive safety interlocks for A2L/A3 gases. Many facilities deploy both tiers.
How many sensors per room?
As a guideline, ~5–10 m radius coverage per sensor in open rooms. Add devices near valves, joints, and low pockets where gas can accumulate.
Calibration interval?
Typical: every 12–24 months with periodic bump tests. Dusty/humid or solvent-rich areas may need more frequent checks and filter maintenance.
Integration with BMS/PLC?
4–20 mA analog scaling (e.g., 4 mA = 0; 20 mA = full-scale), RS-485 Modbus RTU (address/baud configurable), and 1–2 relays for pre-alarm/main interlocks.
Ali lahko Winsen prilagodi programe OEM?
Yes—ranges, firmware/Modbus mapping, connectors/harnesses, housings (IP rating), labels/branding, and packaging are customizable for volume deployments.
