LEFOO LFH51 Probe Type Temperature and Humidity Transmitter

Original manufacturer LFH51 model image — Original LEFOO LFH51 manufacturer model image, showing one display / housing / probe configuration. Exact ordered variant may differ. Official model source.

Probe-type humidity and temperature transmitter for duct or equipment measurement. The model is listed in LEFOO’s official downloadable technical document index.

Manufacturer: LEFOO

Official Technical Datasheet

LEFOO original datasheet catalog — search model LFH51 →

Accuracy, measurement range, electrical outputs, probe length and installation environment depend on variant and current revision. Check manufacturer data prior to equipment specification.

LFH51 remote probe integration

For the LFH51 probe-type architecture, determine the probe dimensions, allowable sensing temperature, probe-cable length and enclosure rating separately. Long cable, EMI and poor sensor exposure can increase effective system uncertainty even if the core RH sensing element is accurate. Ensure the controller understands both humidity and temperature channel scale, and distinguish a remote probe from an integrated wall-mount LFH10.

LFH51 — separate digital probe and signal selection

Humidity	0–100% RH with ±3% RH accuracy specified at 20°C and 60% RH.
Temperature	Digital sensor, ±0.3°C at 20°C by manufacturer model page.
Signal and supply	RS485 Modbus or 0–10 V, 12–36 VDC input; no 4–20 mA option listed for LFH51 itself.
Housing	PC probe shell and IP65 assembled protection.
Temperature and humidity exposure	−40 to +85°C, 5–95% RH non-condensing.

Engineering note: The two output modes are alternatives, not simultaneous; do not transfer LFH10’s 4–20 mA connections to LFH51. Cable sealing and ventilation duct location affect real humidity response.

Original LEFOO model specification and order-selection reference (checked 26 October 2026).