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）。選擇 是n 用於 ppm 預警或 MOS/DIR 用於 %LEL 安全聯鎖。標準 4–20 Ma，，，， RS-485 總線， 和 繼電器輸出 streamline BMS/PLC integration.
- A1 / A2L / A3 覆蓋範圍
- NDIR ppm & MOS %LEL
- OEM/ODM • 批量訂單
- 交貨時間快
Model Guide — Select by Gas Family & Measurement
A1 HFC/HFO — NDIR PPM
- Ranges: 0–1,000 / 0–5,000 ppm (customizable)
- 輸出：4–20 mA、RS-485 Modbus、1–2 個繼電器
- T90 ≤ 30 s • 低漂移，長壽命
*R22/R12 是許多地區的傳統服務氣體。
A2L Low-GWP — NDIR PPM / %LEL
- PPM 預警和/或 0–100% LFL/LEL
- 4–20 mA / RS-485 / 繼電器
- Ideal for VRF/VRV rooms & heat pumps
A3 易燃 — %LEL 安全
- 範圍：0–100% LEL（NDIR-LEL 或 MOS）
- Relays for ventilation & shutdown interlocks
- IP65 housings available
What “Freon” Means
In day-to-day language, people often say “弗萊恩” to mean 任何 冷媒.從技術上來說， 氟利昂™ 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 在 HVAC/R 空間中。
NDIR製冷劑傳感器
半導體製冷劑傳感器
技術選擇
| 技術 | 最適合 | 範圍 | 優勢 | 注意事項 |
|---|---|---|---|---|
| NDIR（紅外線） | A1 ppm； A2L ppm/%LEL | ppm → %LEL | 高選擇性、低漂移、不依賴氧氣 | 保護光學器件免受冷凝/灰塵影響（過濾器/外殼） |
| MOS（半導體） | A2L/A3%LEL | 0–100% LEL | 快速響應；強壯的;性價比高 | Possible cross-sensitivities; periodic calibration recommended |
| 催化珠 | 一般碳氫化合物 (A3) | 0–100% LEL | 技術成熟 | 需要氧氣；可能會被矽樹脂/鉛中毒 |
典型應用
VRF/VRV indoor units & hotel rooms
安裝在室內設備和匯集點附近的低處（距地面約 150-300 毫米）。預報警→新鮮空氣吹掃；主報警→風機/室內機關閉。
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
安裝在箱體下方以及沿歧管/管路安裝；選擇防冷凝設計和窗簾/排氣聯鎖裝置。
數據中心行內/CRAC 單元
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.
核心規格
| 範圍 | 價值/選項 |
|---|---|
| 測量 | NDIR ppm 和/或 %LFL (MOS/NDIR-LEL) |
| 輸出 | 4–20 mA（2/3 線）、RS-485 Modbus RTU、1–2 個繼電器（常開/常閉） |
| 響應時間（T90） | ≤ 20–30 秒（典型值） |
| 供應 | 12–24 VDC（其他應要求提供） |
| 工作條件 | −20…+50°C； 15–95% 相對濕度，無冷凝（取決於型號） |
| 外殼 | 牆壁、面板、管道；外殼高達 IP65 |
| 遵守 | CE & RoHS; designed for BMS/PLC integration |
Placement & Setpoints — Good Practice
- 安裝高度： Most refrigerants are heavier than air ⇒ mount low; confirm with on-site airflow.
- 覆蓋範圍： 開放房間中每個傳感器的半徑約為 5–10 m；在閥門/接頭和低口袋附近添加單元。
- 警報： A2L/A3：預報警≈25%LFL；主要約 50% LFL。 A1：每個項目規範的 ppm 範圍（例如 1,000–5,000 ppm）。
- 聯鎖： Pre-alarm → ventilation; Main → equipment shutdown + beacon/horn/BMS event.
根據您的項目規範和當地規範最終確定閾值和數量。
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常見問題解答 — 氟利昂氣體傳感器
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.
我需要 ppm 或 %LEL 嗎？
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.
文森可以定制OEM方案嗎？
Yes—ranges, firmware/Modbus mapping, connectors/harnesses, housings (IP rating), labels/branding, and packaging are customizable for volume deployments.
