PHD-99S Two-Wire Explosion-proof pH/ORP Transmitter
The PHD-99S transmitter is a two-wire, single-channel pH/ORP transmitter independently developed by Dongrun Instruments. It is available in both explosion-proof and intrinsic safety versions, and supports the Hart 7.5 communication protocol. The transmitter features a robust housing with a high protection rating, capable of withstanding harsh environments. It is compatible with Dongrun as well as commonly used analog pH sensors in the market.
Product Features
Better Explosion-proof Performance:
- Optional Exdb IICT6Gb explosion-proof certification, allowing operation with a magnetic rod on the outer casing in explosive environments, ensuring safety and reliability.
- Optional Exia IICT6 Ga intrinsic safety explosion-proof certification, compatible with safety barriers, providing a wider range of applications.
Excellent Environmental Adaptability:
- IP66 protection rating certification, with a thickened aluminum alloy housing, providing a strong, weather-resistant casing.
- The intrinsic safety circuit board adopts a high-insulation resin encapsulation process, offering better corrosion resistance and explosion-proof performance.
- Temperature range: -20°C to 60°C, suitable for more application scenarios.
Intelligent Instrument:
- Two-wire intelligent instrument, HART 7.5 communication protocol allows transmission of more instrument status information (official member of the HART Communication Foundation).
- Calibration and parameter setting via two buttons, with a multi-level menu tree design, making operation simple and convenient.
- Automatic temperature compensation, manual selection of PT100/PT1000 temperature sensors.
- Two-point calibration, automatic pH solution recognition.
High Instrument Accuracy:
- pH Transmitter: ±0.03 (high input impedance design).
Application Areas
It is widely used in industrial reaction processes, water treatment, circulating water, wastewater, boiler water, environmental protection, and other application environments.
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