Electronic AC Leak Sensor (Electronic AC Leak Detector) — Split/VRF • Central AC
Ang Winsen® electronic AC leak sensor ay nagbibigay ng tuluy-tuloy, nakapirming pagsubaybay para sa air-conditioning nagpapalamig sa buong tirahan at komersyal na mga gusali. Sinusuportahan namin A1 (R134a, R410A, R404A), A2L (R32, R454B, R1234yf/ze) at A3 (R290, R600a) na mga gas. Pumili Ay n para sa ppm maagang babala o MOS/IR-LEL para sa %LEL na mga interlock na pangkaligtasan—handa para sa BMS/PLC sa pamamagitan ng 4–20 mA, RS-485 Modbus, at mga output ng relay.
- A1 / A2L / A3 na Saklaw
- NDIR ppm & MOS %LEL
- OEM/ODM • Maramihang Order
- Mabilis na Lead Time
Model Guide — Pick by Refrigerant Class & Measurement
A1 (R410A / R134a) — 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
A2L (R32 / R454B / R1234yf/ze) — NDIR PPM / %LEL
- Maagang babala ng PPM at/o 0–100% LFL/LEL
- 4–20 mA / RS-485 / mga relay
- VRF rooms & hotel guestrooms
A3 (R290 / R600a) — %LEL Kaligtasan
- Saklaw: 0–100% LEL (IR-LEL o MOS)
- Relays for ventilation & shutdown interlocks
- IP options for cold/mechanical spaces
What is an Electronic AC Leak Sensor?
An electronic AC leak sensor is a fixed, continuously-monitoring detector installed near indoor units, AHUs, or mechanical rooms to measure refrigerant concentration and automatically trigger mga alarma at magkakaugnay (purge fans, equipment shutdown). It complements the handheld sniffers technicians use for pinpointing leaks.
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 & stability; not O₂-dependent; long life | Protect from heavy condensation/dust (filters/enclosure) |
| MOS (Semiconductor) | A2L/A3%LEL | 0–100% LEL | Mabilis na tugon; matatag; cost-effective | Cross-sensitivities possible; periodic calibration advised |
| Catalytic Bead | Pangkalahatang hydrocarbon (A3) | 0–100% LEL | Mature tech for flammables | Requires O₂; susceptible to poisons (silicones/lead) |
Mga Karaniwang Aplikasyon
Split/VRF 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.
Central AC (AHU/MAU) & mechanical rooms
Place near coils, TXVs, and floor low spots/sumps; use IP-rated housings. Integrate with BMS to start purge fans at pre-alarm and trip systems at main alarm.
Line sets, condenser/evaporator sections
Monitor around brazed joints, service valves, manifolds; avoid strong supply streams that could bypass the sensor.
Mga heat pump
For A2L/A3 systems, 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/IR-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 AC refrigerants are heavier than air ⇒ mount low; confirm with room 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; main ≈50% LFL. A1: ppm tiers (e.g., 1,000–5,000 ppm) per design spec.
- Interlocks: Pre-alarm → bentilasyon; Pangunahing → pagsasara ng kagamitan + beacon/horns/BMS event.
Finalize thresholds and quantities against local codes and your project specification.
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Humiling ng Konsultasyon
Mga FAQ — Mga Sensor ng Freon Gas
How many sensors do I need per room?
Plan ~5–10 m radius coverage per sensor in open rooms. Add units near indoor units, valves, joints, and floor-level pockets where gas may accumulate. Irregular layouts typically need more sensors.
What alarm thresholds should I use?
For A2L/A3 gases: pre-alarm ≈25% LFL to start ventilation; main ≈50% LFL to trip equipment and trigger beacons/horns. For A1 gases, use ppm bands (e.g., 1,000–5,000 ppm) per project spec and risk assessment.
Where should the sensor be mounted?
Most AC refrigerants are heavier than air; mount low (≈150–300 mm above floor) near likely leak sources and pooling points. Avoid strong supply air that could bypass the sensor. Probe/duct versions can monitor return air.
How often should I calibrate and bump-test?
Typical calibration is every 12–24 months with periodic bump tests (quarterly/biannual). Dusty or humid sites, or areas with cleaning aerosols, may need more frequent checks and filter maintenance.
Which technology should I choose: NDIR or MOS?
Choose NDIR for ppm early warning and long-term stability; choose MOS or IR-LEL for %LEL safety interlocks on A2L/A3 systems. Many sites use both tiers for redundancy.
Can Winsen customize for OEM/volume programs?
Yes—ranges, firmware, Modbus mapping, connectors/harnesses, housings (IP rating), labels/branding, and packaging can be tailored for volume deployments.
