Freon Gas Sensor (Freon Gas Detector) — Fixed Monitoring for HVAC/R
Winsen® mengeluarkan tetap 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). pilih Adalah n untuk amaran awal PPM atau Mos/dir untuk %LEL kunci keselamatan. Standard 4-20 Ma, RS-485 Modbus, dan Output relay streamline BMS/PLC integration.
- Liputan A1 / A2L / A3
- NDIR ppm & MOS %LEL
- OEM/ODM • Pesanan pukal
- Masa memimpin pantas
Model Guide — Select by Gas Family & Measurement
A1 HFC/HFO - NDIR PPM
- Ranges: 0–1,000 / 0–5,000 ppm (customizable)
- Output: 4-20 Ma, RS-485 Modbus, 1-2 Relay
- T90 ≤ 30 s • Drift Rendah, Hayat Panjang
*R22/R12 ialah gas perkhidmatan warisan di banyak wilayah.
A2L Low-GWP — NDIR PPM / %LEL
- Amaran awal PPM dan/atau 0–100% LFL/LEL
- 4-20 MA / RS-485 / Relay
- Ideal for VRF/VRV rooms & heat pumps
A3 mudah terbakar - Keselamatan LEL %
- Julat: 0-100% LEL (NDIR-LEL atau MOS)
- Relays for ventilation & shutdown interlocks
- IP65 housings available
What “Freon” Means
In day-to-day language, people often say “Freon” to mean mana-mana bahan penyejuk. Secara teknikalnya, 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 dalam ruang HVAC/R.
Sensor penyejuk NDIR
Sensor penyejuk semikonduktor
Pilihan Teknologi
| Teknologi | Terbaik untuk | Julat | Kelebihan | Pertimbangan |
|---|---|---|---|---|
| Ndir (inframerah) | A1 ppm; A2L PPM/%LEL | PPM → %LEL | Selektiviti yang tinggi, drift rendah, tidak bergantung | Protect optics from condensation/dust (filters/enclosures) |
| MOS (Semikonduktor) | A2L/A3%LEL | 0-100% LEL | Tindak balas pantas; kuat; kos efektif | Possible cross-sensitivities; periodic calibration recommended |
| Manik pemangkin | Hidrokarbon Umum (A3) | 0-100% LEL | Mature technology | Keperluan o₂; boleh diracuni oleh silikon/plumbum |
Aplikasi biasa
VRF/VRV indoor units & hotel rooms
Lekapkan rendah (~150–300 mm di atas lantai) berhampiran unit dalaman dan titik pengumpulan. Pra-penggera → pembersihan udara segar; penggera utama → penutupan kipas/unit dalaman.
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
Pasang di bawah kes -kes dan sepanjang manifolds/paip berjalan; Pilih reka bentuk yang tahan kondensasi dan interlocks tirai/ekzos.
Pusat Data In Row/Unit CRAC
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.
Spesifikasi Teras
| Parameter | Nilai / pilihan |
|---|---|
| Pengukuran | NDIR PPM dan/atau %LFL (MOS/NDIR-LEL) |
| Output | 4-20 Ma (2/3-wire), RS-485 Modbus RTU, 1-2 relay (n.o./n.c.) |
| Masa tindak balas (T90) | ≤ 20-30 s biasa |
| Bekalan | 12-24 VDC (yang lain atas permintaan) |
| Keadaan operasi | -20 ...+50 ° C; 15-95% RH Non-condensing (bergantung kepada model) |
| Kandang | Dinding, panel, saluran; perumahan sehingga IP65 |
| Pematuhan | CE & RoHS; designed for BMS/PLC integration |
Placement & Setpoints — Good Practice
- Ketinggian pemasangan: Most refrigerants are heavier than air ⇒ mount low; confirm with on-site airflow.
- Liputan: ~ 5-10 m radius setiap sensor di bilik terbuka; Tambah unit berhampiran injap/sendi dan poket rendah.
- Penggera: A2L/A3: pra-penggera ≈25% LFL; utama ≈50% LFL. A1: jalur ppm (mis., 1,000–5,000 ppm) bagi setiap spesifikasi projek.
- Interlocks: Pre-alarm → ventilation; Main → equipment shutdown + beacon/horn/BMS event.
Memuktamadkan ambang dan kuantiti terhadap spesifikasi projek anda dan kod tempatan.
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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.
Adakah saya memerlukan PPM atau %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.
Bolehkah Winsen menyesuaikan untuk program OEM?
Yes—ranges, firmware/Modbus mapping, connectors/harnesses, housings (IP rating), labels/branding, and packaging are customizable for volume deployments.
