Measurement Principle & Electrical Performance

Adopts high-temperature resistant capacitive humidity sensing chip with built-in temperature compensation circuit to offset measurement deviation caused by high-temperature environment drift. Relative humidity measuring accuracy reaches ±2%RH, temperature precision is ±0.3℃; measuring temperature range covers -40℃ ~ 200℃. It can automatically calculate dew point, absolute humidity and other derived parameters internally. Two independent 4–20mA current loops output temperature and humidity signals separately, with load capacity ≤500Ω; RS485 bus realizes multi-point networking data transmission. All calibration parameters are solidified in non-volatile storage without data loss after power failure, and core electronic components pass high-low temperature aging screening to ensure stable long-term operation.

Structural Design & Environmental Adaptability

The main shell is aluminum alloy with IP65 protection grade, the measuring probe is made of stainless steel with sintered anti-blocking filter head to resist dust and oil mist pollution in high-temperature gas. Two installation modes of pipeline thread and flange are optional, the probe and main body are connected by high-temperature PFA flexible cable for convenient field layout. Internal circuit board is coated with anti-corrosion conformal coating, resistant to damp and weak corrosive gas environment, complying with industrial EMC anti-interference standards to adapt to oven, heat treatment workshop and boiler pipeline working conditions. Optional built-in anti-condensation heating function prevents probe water mist condensation failure.

Matched Components & Application Scenarios

Support matched stainless steel extension probes of different lengths, supporting PLC, DCS and industrial touch screen access via analog quantity or bus signal. Mainly applied to industrial drying equipment, food baking pipelines, heat treatment furnace atmosphere monitoring, boiler flue gas humidity detection, textile printing and dyeing high-temperature oven monitoring and new energy high-temperature process gas detection. It serves as replacement spare part when the original transmitter has signal drift, probe failure and communication abnormal faults.

Stability & Maintenance Advantages

The probe supports on-site disassembly and replacement without replacing the whole transmitter to reduce maintenance cost. No internal mechanical wearing parts, long service cycle and low daily maintenance workload. Factory unified calibration ensures consistent measurement accuracy of batches; simple wiring and parameter setting shorten field debugging time. Standard sealed packaging meets long-term spare parts storage requirements, and overall measurement performance remains stable under dry constant-temperature storage environment.