LEFOO LFW21 Integrated Temperature Transmitter
Compact integrated temperature transmitter model for industrial or HVAC use. The model is listed in LEFOO’s official downloadable technical document index.
Manufacturer: LEFOO
Official Technical Datasheet
LEFOO original datasheet catalog — search model LFW21 →
Accuracy, measurement range, electrical outputs, probe length and installation environment depend on variant and current revision. Check manufacturer data prior to equipment specification.
LFW21 integrated output
An integrated temperature transmitter is not electrically interchangeable with a passive thermistor or RTD. Confirm its supply, actual output type, measuring range and mounting interface from the ordered LFW21 part. Establish controller input scaling and wiring polarity, then test the temperature reading with a reference under installed conditions; a similar LEFOO housing image is not evidence of connector interchangeability.
LFW21 — industrial integrated temperature transmitter
| Selection parameter | Verified manufacturer evidence |
|---|---|
| Measurement and media | Liquid or gas compatible with contact materials; specified −50 to +200°C measuring range. |
| Accuracy | Manufacturer states 0.5% of full scale for configured variant. |
| Electrical output | 4–20 mA, 0–10 V or passive Pt100/Pt1000 alternatives; these are separate device types. |
| Supply | 15–33 VDC on powered transmitter configurations; check whether passive resistive output requires an external excitation circuit. |
| Mechanical | 304 stainless-steel housing/probe and ABS Hirschmann connector; IP65 without display, IP54 with display when connection is complete. |
Engineering note: Do not assume IP65 for the display-equipped version or a 4–20 mA output from the passive Pt100 option. Match probe insertion depth, process sealing and ambient temperature to the ordered assembly.
Official LEFOO model specification · examined 26 October 2026.