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QDW90A-3 Waterproof Pressure Transmitter for Industry

A waterproof pressure transmitter built for reliable, durable measurement in humid, splash-prone, and steam-exposed industrial environments.
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QDW90A-3 Waterproof Cable Pressure Transmitter

QDW90A-3(1)

Waterproof Design for Wet Environments

The QDW90A-3 industrial pressure transmitter is specifically engineered to deliver stable pressure measurement in highly demanding wet, humid, and splash-prone environments. Unlike standard sensors that rely on exposed external connectors, this model utilizes an integrated waterproof cable-outlet structure. This design choice makes it exceptionally well-suited for pump rooms, municipal water-supply equipment, and heavy-duty cleaning systems where moisture ingress is a primary concern.

QDW90A-3(2)

Compact Integration for Equipment Manufacturers

The compact body of the QDW90A-3 pressure sensor is tailored to support direct integration inside complex industrial equipment without requiring bulky external installation assemblies. In modern machinery design, space optimization is crucial. This transmitter can be easily mounted in tight spaces close to internal pumps, control valves, or narrow process pipelines where physical room is severely limited, yet accurate pressure signals must be reliably collected from within the machine's core structure.

QDW90A-3(3)

Direct Cable Outlet for Easier Wiring

To further optimize spatial efficiency and installation convenience, the QDW90A-3 utilizes a direct cable outlet design rather than relying on a traditional detachable external plug. This structural advantage allows the integrated cable to be routed immediately into the main equipment wiring harness or directly into the central control box. By eliminating the extra vertical clearance required by bulky plug-in connectors, it significantly reduces the overall connector height and saves critical operational space immediately surrounding the transmitter body.

Working Principle Diagram

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Technical Specifications

Measurement Type:Gauge pressure (G), absolute pressure (A), and negative pressure/vacuum options available


Standard Range Coverage:0–10 kPa / 0–100 kPa / 0–1 MPa / 0–2.5 MPa / 0–10 MPa / 0–40 MPa


Overall Accuracy Class:Standard Class 0.2: ±0.2% FS; optional economy Class 0.5: ±0.5% FS


Independent Nonlinearity Error:≤±0.1% FS


Hysteresis and Repeatability Errors:≤±0.05% FS


Temperature Drift Across the Full Temperature Range:≤±0.03% FS/°C (full compensation range: -20°C to 80°C)


Zero Point / Full-Scale Temperature Drift:≤±0.02% FS/°C


Step Response Time:≤10 ms (10%–90% full scale step); supports customized damping parameters for smooth output


Long-Term Stability:≤±0.2% FS/year; compact size without compromising long-term stability


Standard Output Signal:4–20 mA two-wire; optional 0–5 V / 0–10 V three-wire, RS485 Modbus-RTU digital output

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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