Electronic AC Leak Sensor (Electronic AC Leak Detector) — Split/VRF • Central AC
Winsen® elektronički senzori curenja izmjenične struje pružaju kontinuirano, fiksno praćenje za rashladna sredstva za klimatizaciju preko stambenih i poslovnih objekata. Podržavamo A1 (R134a, R410A, R404A), A2L (R32, R454B, R1234yf/ze) i A3 (R290, R600a) plinovi. Odaberite Je n za ppm rano upozorenje ili MOS/IR-LEL za %LEL sigurnosne blokade—spremno za BMS/PLC putem 4–20 mA,, RS-485 Modbus, i relejni izlazi.
- A1 / A2L / A3 pokrivenost
- NDIR ppm & MOS %LEL
- OEM/ODM • Skupne narudžbe
- Brzo vrijeme isporuke
Model Guide — Pick by Refrigerant Class & Measurement
A1 (R410A / R134a) — NDIR PPM
- Ranges: 0–1,000 / 0–5,000 ppm (customizable)
- Izlazi: 4–20 mA, RS-485 Modbus, 1–2 releja
- T90 ≤ 30 s • Malo pomicanje, dug život
A2L (R32 / R454B / R1234yf/ze) — NDIR PPM / %LEL
- PPM rano upozorenje i/ili 0–100% LFL/LEL
- 4–20 mA / RS-485 / releji
- VRF rooms & hotel guestrooms
A3 (R290 / R600a) — %LEL sigurnost
- Raspon: 0–100% LEL (IR-LEL ili 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 alarmi i blokade (purge fans, equipment shutdown). It complements the handheld sniffers technicians use for pinpointing leaks.
NDIR senzor rashladnog sredstva
Semiconductor senzor rashladnog sredstva
Tehnološke mogućnosti
| Tehnologija | Najbolje za | Raspon | Prednosti | Razmatranja |
|---|---|---|---|---|
| NDIR (infracrveni) | A1 ppm; A2L ppm/%LEL | ppm → %LEL | High selectivity & stability; not O₂-dependent; long life | Zaštitite od jake kondenzacije/prašine (filteri/kućište) |
| MOS (poluvoditelj) | A2L/A3%LEL | 0–100% LEL | Brzi odgovor; robustan; isplativo | Moguća unakrsna osjetljivost; preporuča se periodična kalibracija |
| Katalitička kuglica | Opći ugljikovodici (A3) | 0–100% LEL | Razvijena tehnologija za zapaljive tvari | Zahtijeva O₂; osjetljiv na otrove (silikoni/olovo) |
Tipične primjene
Split/VRF indoor units & hotel rooms
Montirajte nisko (~150–300 mm iznad poda) u blizini unutarnjih jedinica i točaka okupljanja. Predalarm → pročišćavanje svježim zrakom; glavni alarm → isključivanje ventilatora/unutarnje jedinice.
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.
Dizalice topline
For A2L/A3 systems, use %LFL tiers (~25% pre-alarm; ~50% main) to trigger ventilation and safe shutdown.
Temeljne specifikacije
| Parametar | Vrijednost / opcija |
|---|---|
| Mjerenje | NDIR ppm i/ili %LFL (MOS/IR-LEL) |
| Izlazi | 4–20 mA (2/3-žica), RS-485 Modbus RTU, 1–2 releja (N.O./N.C.) |
| Vrijeme odziva (T90) | ≤ 20–30 s tipično |
| Opskrbiti | 12–24 VDC (ostali na zahtjev) |
| Radni uvjeti | −20…+50 °C; 15–95% RH bez kondenzacije (ovisno o modelu) |
| Kućišta | Zid, ploča, kanal; kućišta do IP65 |
| Usklađenost | CE & RoHS; designed for BMS/PLC integration |
Placement & Setpoints — Good Practice
- Montažna visina: Većina AC rashladnih sredstava je teža od zraka ⇒ postavite nisko; potvrditi protokom zraka u prostoriji.
- Pokrivenost: ~5–10 m radijus po senzoru u otvorenim prostorijama; dodajte jedinice blizu ventila/zglobova i niskih džepova.
- Alarmi: A2L/A3: predalarm ≈25% LFL; glavni ≈50% LFL. A1: razine ppm (npr. 1000–5000 ppm) po specifikaciji dizajna.
- Blokade: Predalarm → ventilacija; Glavni → isključivanje opreme + signalni signali/trube/BMS događaj.
Dovršite pragove i količine prema lokalnim propisima i specifikacijama vašeg projekta.
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Često postavljana pitanja — senzori plina freona
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.
