Yokogawa EXA PH202 2-wire pH/ORP Transmitter

Description

 Yokogawa EXA PH202 is a loop-powered, 2-wire pH/ORP analyzer designed for reliable and accurate measurement in industrial process environments. Housed in a rugged IP65-rated enclosure, it supports both field and panel mounting. With flexible configuration options and support for HART®, PROFIBUS-PA, and FOUNDATION Fieldbus communication, it’s ideal for applications in water treatment, chemical processing, and food and beverage industries.

Specifications

• Input Ranges: – pH: -2 to 16 pH – ORP: -1500 to +1500 mV – Temperature: -30°C to 140°C
• Output Signal: 4–20 mA DC, loop-powered, isolated
• Power Supply: 17–40 V DC (nominal 24 V DC)
• Accuracy: – pH: ±0.01 pH – ORP: ±1 mV
• Display: Custom LCD, 3½ digits, 12.5 mm high
• Ambient Conditions: – Temperature: -10°C to 55°C – Humidity: 10–90% RH (non-condensing)
• Mounting: Field or panel mountable, IP65 enclosure
• Approvals: Intrinsically safe versions available (FM, CSA, CENELEC)

Features

• Dual High-Impedance Inputs: Supports universal pH/ORP sensors with differential input amplifier
• Flexible Communication: HART®, PROFIBUS-PA, and FOUNDATION Fieldbus compatibility
• Sensor Diagnostics: On-line sensor checking and event logbook for maintenance tracking
• Temperature Compensation: Automatic or manual, with multiple sensor types supported
• User-Friendly Interface: EXA control panel with password protection and configurable parameters
• Low Installation Cost: 2-wire design reduces cabling and simplifies setup
• Hazardous Area Ready: IS versions suitable for Zone 0/1 installations