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QDW90A-8 Explosion-Proof Pressure Transmitter for Hazardous Areas

A compact explosion-proof pressure transmitter for Zone 1/Zone 2 hazardous environments, offering flexible 4–20mA, voltage, and RS485 outputs for reliable PLC/DCS integration.
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QDW90A-8 Explosion-Proof Pressure Transmitter

QDW90A-8(1)

Intrinsically Safe Pressure Isolation

QDW90A-8 is a pressure transmitter designed around “Intrinsically Safe Pressure Isolation.” Separates the hazardous-area pressure loop from the safe-side control system. The isolated signal path separates the hazardous-area device from the safe-side control system and helps limit unwanted electrical interaction across the barrier. The feature is directly relevant to chemical process, gas pipeline and pressure monitoring projects. Protect hazardous-area loops while keeping safe-side data stable, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

QDW90A-8(2)

Installation-focused Design for Pressure Transmitter

QDW90A-8 is a pressure transmitter designed around “Installation-focused Design for Pressure Transmitter.” The dedicated mechanical and connector structure simplifies installation, replacement and field maintenance. The dedicated mechanical, connector or mounting structure helps the instrument fit the intended pipe, tank, cabinet or equipment interface. The feature is directly relevant to chemical process, gas pipeline and pressure monitoring projects. Shorten installation time and simplify later field maintenance, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

QDW90A-8(3)

Industrial Pressure Signal Transmission

QDW90A-8 is a pressure transmitter designed around “Industrial Pressure Signal Transmission.” Transfers the measured pressure to PLC, DCS or remote monitoring systems. The standardized signal path routes the measured value to PLCs, DCS platforms, displays or remote monitoring equipment. The feature is directly relevant to chemical process, gas pipeline and pressure monitoring projects. Connect field measurements directly to existing plc and monitoring systems, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

Working Principle Diagram

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Technical Specifications

Zero Temperature Drift:±0.03% F.S./℃ (within compensated temperature range)


Sensitivity Temperature Drift:±0.03% F.S./℃ (within compensated temperature range)


Non-linearity Error:≤0.2% F.S. (calculated by Best Fit Straight Line, BFSL)


Repeatability Error:≤0.05% F.S.


Hysteresis Error:≤0.05% F.S.


Long-term Stability:≤0.2% F.S./year, minimizes on-site calibration requirements


Step Response Time:≤1ms (10% → 90% full scale output)


Natural Resonant Frequency:5kHz ~ 650kHz (varies with measuring range)


Output Ripple:≤10mV peak-to-peak


Output Short-circuit Protection:Fully supported; no permanent component damage under continuous short circuit


Reverse Polarity Protection:Fully supported; no damage or reverse leakage with reversed power wiring

Dimension Chart

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Wiring Diagram

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Phone: +86-19715617532
Add: Building 14, University Science and Technology Park, Fenghuangshan Economic Development Zone, Xiangshan District, Huaibei City, Anhui Province

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