Freon Gas Sensor (Freon Gas Detector) — Fixed Monitoring for HVAC/R
Winsen® manufactures fixed 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 Yra n ppm išankstinio įspėjimo arba MOS / DIR for %LEL safety interlocks. Standard 4–20 mAAr RS-485 Modbus, ir relės išėjimai streamline BMS/PLC integration.
- A1 / A2L / A3 aprėptis
- NDIR ppm & MOS %LEL
- OEM/ODM • Masiniai užsakymai
- Greitas pristatymo laikas
Model Guide — Select by Gas Family & Measurement
A1 HFC/HFO — NDIR PPM
- Ranges: 0–1,000 / 0–5,000 ppm (customizable)
- Outputs: 4–20 mA, RS-485 Modbus, 1–2 relays
- T90 ≤ 30 s • Low drift, long life
*R22/R12 are legacy service gases in many regions.
A2L Low-GWP — NDIR PPM / %LEL
- PPM early warning and/or 0–100% LFL/LEL
- 4–20 mA / RS-485 / relays
- Ideal for VRF/VRV rooms & heat pumps
A3 Flammable — %LEL Safety
- Range: 0–100% LEL (NDIR-LEL or MOS)
- Relays for ventilation & shutdown interlocks
- IP65 housings available
What “Freon” Means
In day-to-day language, people often say “Freonas” 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 šaltnešio jutiklis
Puslaidininkinis šaltnešio jutiklis
Technology Options
| Technologijos | Geriausias | Diapazonas | Privalumai | Svarstymai |
|---|---|---|---|---|
| NDIR (infraraudonųjų spindulių) | A1 ppm; A2L ppm/%LEL | ppm → %LEL | High selectivity, low drift, not O₂-dependent | Protect optics from condensation/dust (filters/enclosures) |
| MOS (puslaidininkis) | A2L/A3%LEL | 0–100% LEL | Fast response; robust; cost-effective | Possible cross-sensitivities; periodic calibration recommended |
| Katalizinis karoliukas | General hydrocarbons (A3) | 0–100% LEL | Mature technology | Reikia O₂; gali apsinuodyti silikonais/švinu |
Tipinės programos
VRF/VRV indoor units & hotel rooms
Mount low (~150–300 mm above floor) near indoor units and pooling points. Pre-alarm → fresh-air purge; main alarm → fan/indoor-unit shutdown.
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.
Duomenų centro eilės/CRAC įrenginiai
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.
Core Specifications
| Parametras | Vertė / parinktis |
|---|---|
| Matavimas | NDIR ppm ir (arba) %LFL (MOS / NDIR-LEL) |
| Išėjimai | 4–20 mA (2/3 laidų), RS-485 Modbus RTU, 1–2 relės (N.O./N.C.) |
| Atsakymo laikas (T90) | ≤ 20–30 s tipiškas |
| Supply | 12–24 VDC (kiti pagal pageidavimą) |
| Eksploatavimo sąlygos | –20…+50 °C; 15–95 % santykinis oro drėgnumas nekondensuojantis (priklauso nuo modelio) |
| Aptvarai | Wall, panel, duct; housings up to IP65 |
| Atitiktis | CE & RoHS; designed for BMS/PLC integration |
Placement & Setpoints — Good Practice
- Montavimo aukštis: Most refrigerants are heavier than air ⇒ mount low; confirm with on-site airflow.
- Aprėptis: ~5–10 m radius per sensor in open rooms; add units near valves/joints and low pockets.
- Alarms: A2L/A3: pre-alarm ≈25% LFL; main ≈50% LFL. A1: ppm bands (e.g., 1,000–5,000 ppm) per project spec.
- Užraktai: Pre-alarm → ventilation; Main → equipment shutdown + beacon/horn/BMS event.
Užbaikite slenksčius ir kiekius pagal savo projekto specifikaciją ir vietinius kodus.
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FAQs — Freon Gas Sensors
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.
Ar man reikia ppm arba %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.
Ar Winsen gali pritaikyti OEM programoms?
Yes—ranges, firmware/Modbus mapping, connectors/harnesses, housings (IP rating), labels/branding, and packaging are customizable for volume deployments.
