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). Pumili Ay n para sa ppm maagang babala o MOS/DIR para sa %LEL na mga interlock na pangkaligtasan. Pamantayan 4–20 mA, RS-485 Modbus, at mga output ng relay streamline BMS/PLC integration.
- A1 / A2L / A3 na Saklaw
- NDIR ppm & MOS %LEL
- OEM/ODM • Maramihang Order
- Mabilis na Lead Time
Model Guide — Select by Gas Family & Measurement
A1 HFC/HFO — NDIR PPM
- Ranges: 0–1,000 / 0–5,000 ppm (customizable)
- Mga Output: 4–20 mA, RS-485 Modbus, 1–2 relay
- T90 ≤ 30 s • Mababang drift, mahabang buhay
*R22/R12 ay mga legacy service gas sa maraming rehiyon.
A2L Low-GWP — NDIR PPM / %LEL
- Maagang babala ng PPM at/o 0–100% LFL/LEL
- 4–20 mA / RS-485 / mga relay
- Ideal for VRF/VRV rooms & heat pumps
A3 Nasusunog — %LEL Kaligtasan
- Saklaw: 0–100% LEL (NDIR-LEL o MOS)
- Relays for ventilation & shutdown interlocks
- IP65 housings available
What “Freon” Means
In day-to-day language, people often say “Freon” to mean anuman nagpapalamig. Sa teknikal, 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 sa mga puwang ng HVAC/R.
NDIR Refrigerant Sensor
Semiconductor Refrigerant Sensor
Mga Pagpipilian sa Teknolohiya
| Teknolohiya | Pinakamahusay Para sa | Saklaw | Kalamangan | Mga pagsasaalang-alang |
|---|---|---|---|---|
| NDIR (Infrared) | A1 ppm; A2L ppm/%LEL | ppm → %LEL | High selectivity, low drift, not O₂-dependent | Protektahan ang mga optika mula sa condensation/dust (mga filter/enclosures) |
| MOS (Semiconductor) | A2L/A3%LEL | 0–100% LEL | Mabilis na tugon; matatag; cost-effective | Possible cross-sensitivities; periodic calibration recommended |
| Catalytic Bead | Pangkalahatang hydrocarbon (A3) | 0–100% LEL | Mature na teknolohiya | Kailangan ng O₂; maaaring malason ng silicones/lead |
Mga Karaniwang Aplikasyon
VRF/VRV indoor units & hotel rooms
Mababa ang bundok (~150–300 mm sa itaas ng sahig) malapit sa mga panloob na unit at pooling point. Pre-alarm → fresh-air purge; pangunahing alarma → pagsara ng fan/indoor-unit.
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.
Mga in-row/CRAC unit ng data center
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.
Mga Pangunahing Pagtutukoy
| Parameter | Halaga / Pagpipilian |
|---|---|
| Pagsukat | NDIR ppm at/o %LFL (MOS/NDIR-LEL) |
| Mga output | 4–20 mA (2/3-wire), RS-485 Modbus RTU, 1–2 relay (N.O./N.C.) |
| Oras ng pagtugon (T90) | ≤ 20–30 s karaniwang |
| Supply | 12–24 VDC (iba kapag hiniling) |
| Mga kondisyon sa pagpapatakbo | −20…+50 °C; 15–95% RH non-condensing (depende sa modelo) |
| Mga enclosure | Wall, panel, duct; mga pabahay hanggang IP65 |
| Pagsunod | CE & RoHS; designed for BMS/PLC integration |
Placement & Setpoints — Good Practice
- Taas ng pag-mount: Most refrigerants are heavier than air ⇒ mount low; confirm with on-site airflow.
- Saklaw: ~5–10 m radius bawat sensor sa mga bukas na silid; magdagdag ng mga yunit na malapit sa mga balbula/joint at mababang bulsa.
- Mga alarm: A2L/A3: pre-alarm ≈25% LFL; pangunahing ≈50% LFL. A1: mga ppm band (hal., 1,000–5,000 ppm) bawat spec ng proyekto.
- Interlocks: Pre-alarm → ventilation; Main → equipment shutdown + beacon/horn/BMS event.
I-finalize ang mga threshold at dami kumpara sa detalye ng iyong proyekto at mga lokal na code.
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Mga FAQ — Mga Sensor ng Freon Gas
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.
Do I need ppm or %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.
Maaari bang mag-customize si Winsen para sa mga programang OEM?
Yes—ranges, firmware/Modbus mapping, connectors/harnesses, housings (IP rating), labels/branding, and packaging are customizable for volume deployments.
