AC Gas Leak Sensor (Air Conditioner Refrigerant Leak Detector) — Split/VRF • Central AC • Heat Pump
Winsen® manufactures fixed AC gas leak sensors for residential and commercial air-conditioning systems. We cover A1 (R134a, R410A, R404A), A2L (R32, R454B, R1234yf/ze) and A3 (R290, R600a) gases. Choose Ir n par ppm agrīnu brīdinājumu vai MOS/REŽ for %LEL safety interlocks—ready for BMS/PLC via 4–20 MaVerdzība RS-485 Modbus, un releju izejasApvidū
- A1 / A2L / A3 pārklājums
- NDIR ppm & MOS %LEL
- OEM/ODM • Lielapjoma pasūtījumi
- Ātrs izpildes laiks
Model Guide — Pick by Refrigerant Class & Measurement
A1 (R410A / R134a) — NDIR PPM
- Tipiski diapazoni: 0–1000 / 0–5000 ppm
- Izejas: 4–20 mA, RS-485 Modbus, 1–2 releji
- T90 ≤ 30 s • Zema novirze, ilgs kalpošanas laiks
A2L (R32 / R454B / R1234yf/ze) — NDIR PPM / %LEL
- PPM early warning and/or 0–100% LFL/LEL
- 4–20 mA / RS-485 / releji
- VRF/VRV rooms & hotel guestrooms
A3 (R290 / R600a) — %LEL Safety
- Diapazons: 0–100% LEL (NDIR-LEL vai MOS)
- Relays for ventilation & shutdown interlocks
- IP options for plant rooms and cold spaces
What is an AC Gas Leak Sensor?
An AC gas leak sensor is a fixed, electronic detector that continuously measures refrigerant concentration around air-conditioning equipment and automatically drives alarms un interlocks (ventilation, fan/indoor-unit shutdown). It complements handheld detectors used by technicians for pinpoint leak search.
NDIR aukstumnesēja sensors
Pusvadītāju aukstumaģenta sensors
Technology Options
| Tehnika | Labākais priekš | Diapazons | Priekšrocības | Apsvērumi |
|---|---|---|---|---|
| NDIR (infrasarkanais) | A1 ppm; A2L ppm/%LEL | ppm → %LEL | High selectivity & stability; not O₂-dependent; long life | Protect from heavy condensation/dust (filters/enclosure) |
| MOS (pusvadītājs) | A2L/A3%LEL | 0–100% LEL | Ātra reakcija; izturīgs; rentabli | Cross-sensitivities possible; periodic calibration advised |
| Katalītiskā lodīte | Vispārējie ogļūdeņraži (A3) | 0–100% LEL | Mature tech for flammables | Requires O₂; susceptible to poisons (silicones/lead) |
Typical AC Applications
Split/VRF 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.
Central AC (AHU/MAU) & mechanical rooms
Place near coils, expansion valves, and floor low spots/sumps; use IP-rated enclosures and BMS interlocks.
Line sets, condenser & evaporator sections
Monitor around brazed joints, service valves, manifolds; avoid strong supply streams that could bypass the sensor.
Heat pumps & general HVAC equipment
For A2L systems, use %LFL tiers (≈25% pre-alarm; ≈50% main) to trigger ventilation and safe shutdown.
Core Specifications
| Parametrs | Vērtība / opcija |
|---|---|
| Mērīšana | NDIR ppm un/vai %LFL (MOS/NDIR-LEL) |
| Izejas | 4–20 mA (2/3 vadu), RS-485 Modbus RTU, 1–2 releji (N.O./N.C.) |
| Reakcijas laiks (T90) | ≤ 20–30 s tipiski |
| Piegāde | 12–24 VDC (citi pēc pieprasījuma) |
| Darbības apstākļi | −20…+50 °C; 15–95% RH nekondensējošs (atkarīgs no modeļa) |
Placement & Setpoints — Good Practice
- Montāžas augstums: Most AC refrigerants are heavier than air ⇒ mount low; confirm with on-site airflow.
- Pārklājums: ~5–10 m radius per sensor in open rooms; add units near valves/joints and low pockets.
- Modinātāji: A2L/A3: pre-alarm ≈25% LFL; main ≈50% LFL. A1: ppm bands (e.g., 1,000–5,000 ppm) per design spec.
- Bloķējumi: Pre-alarm → ventilation; Main → equipment shutdown + beacons/horns/BMS events.
Pabeidziet sliekšņus un daudzumus atbilstoši vietējiem kodiem un projekta specifikācijām.
Kāpēc globālie klienti izvēlas mūs?
Uzņēmums konsekventi ievēro kvalitatīvu politiku “smalkas meistarības, zinātniskas inovācijas, izcilības sasniegšana un pievienotā vērtība”. Formulējot ražošanas procesa kontroles plānus un darba instrukcijas, tas ir izveidojis standartizētu, atbildīgu un regulētu procesu pārvaldības sistēmu. Turklāt uzņēmums ir patstāvīgi izstrādājis Mes ražošanas pārvaldības sistēmu, kas nodrošina visaptverošu un vizuālu pārvaldību visā darbplūsmā.
30+ gadu pieredze
R&D, manufacture and sales of sensors and sensing solutions.
Kvalitātes garantija nepārtraukta uzlabošana
Pilnīga un stingra procesa plūsmas kontrole, kā arī ievērojami uzlabojumi.
Starptautiskais tirgus
Piegādājiet sensoru produktus vairāk nekā 100 valstīm un reģioniem.
Stabila piegādes ķēde Uzticama ražošana
Galvenās sastāvdaļas, uz kurām nav pakļauti ierobežojumi, uzlabotas iekārtas ražošanai un pārbaudei.
R&D STRENGTH TECHNOLOGY INNOVATION
200+ patents, 180+ R&D team members, self-built labs for continous innovation.
Vienas pieturas pakalpojums
Profesionāla konsultācija, ātra piegāde, 24 stundas pēc pārdošanas atbalsta.
Leading the Industry, Innovative & Controllable Technology
With robust R&D capabilities, we maintain sustained input in R&D and unwavering commitment to technological innovation. This not only ensures that we remain at the forefront of industry but also drives continuous innovation, leading the future trend of the sensing industry.
Pieprasīt konsultāciju
FAQs — Infrared (NDIR) Refrigerant Leak Sensors
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.
