LEFOO LFG201 Wall-Mounted CO₂ Transmitter
Infrared CO₂ transmitter with 0–2,000/5,000/10,000 ppm variants and analog or RS485 outputs.
Manufacturer: LEFOO
Measurement: CO₂
Official Documentation
Official manufacturer product information →
Measurement range, output options, current revision and compliance must be checked against the exact manufacturer datasheet. Family listings do not establish specifications for every configured SKU.
LFG201 — wall CO₂ versus duct sample
The wall-mounted LFG201 is a room CO₂ transmitter with 2,000, 5,000 or 10,000 ppm model-range choices. Place it near representative occupied air, not at an outdoor-air inlet or behind a window draft. Confirm output configuration and sensor calibration strategy for spaces with persistently elevated CO₂. Its room enclosure differs mechanically from the duct LFG202 even where both report ppm CO₂.
LFG201 — wall CO₂ transmitter with three selectable concentration ranges — exact-model engineering review
LEFOO’s official model descriptions specify variant-dependent measuring range, compensation, protection and communication requirements. Listed options must not be assumed on every purchased unit.
| Parameter | OEM documentation | Design note |
|---|---|---|
| Gas-specific physics | Dual-channel NDIR optical CO₂ (not electrochemical carbon monoxide) | Actual CO₂ measurement versus eCO₂ VOC equivalent. |
| Orderable spans | 0–2,000, 0–5,000 and 0–10,000 ppm versions | Ordered range must match BAS full-scale and alarm limits. |
| Maker accuracy | ±(40 ppm + 3% of full scale) at 25 °C, original model HTML | Full-scale error is different from LFG202’s ±(40 ppm + 3% measured value). |
| Startup | Approx 2 min available; ~10 min to maximum accuracy | Ignore or flag startup sensor values before occupancy alarms. |
| Signal types | 3-wire 4–20 mA, 0–5 V, 0–10 V; RS485 Modbus option | Confirm terminal/cable layout and address by ordered output variant. |
| Supply distinction | 10–30 V DC on most options; 16–30 V DC for 0–10 V configuration | Voltage variant cannot run below specified minimum. |
| Housing / use | IP6x class; −10 to +50 °C; low-humidity indoor/service applications | Confirm that the enclosure sealing and cable entry suit the specified installation environment. |
Application selection and commissioning
LFG201’s wall mounting and dual-channel NDIR architecture differ from LFG202’s duct insertion and ABC algorithm. For a continually enriched mushroom-room or greenhouse location, determine whether the room ever returns to clean ambient baseline; do not assume generic automatic self-calibration suitability. Compare percent-full-scale error versus percent-of-measured-value error correctly when selecting 10,000 ppm instead of 2,000 ppm. Configure host scaling for an actual order suffix and verify minimum supply under load.
Original manufacturer specifications: LEFOO current exact-model product data. Confirm revision-specific pinout, current certificate and ordered interface before installing.
AirAlign independent technical model profile · 25 October 2026. Model tables distinguish manufacturer nominal data from finished equipment approval.