Greisinger pH siųstuvas be elektrodo GPHU 014 MP/BNC (104225)

Process engineers and maintenance teams who need continuous pH monitoring without an on-board display will find the Greisinger GPHU 014 MP/BNC a precise and dependable signal conditioner. With an input impedance greater than 10^12 Ohm, it handles high-resistance pH electrodes accurately, converting their signal into a linear 0-10 V or 4-20 mA output for seamless integration into control systems.

Why it fits demanding industrial environments

• High input impedance > 10^12 Ohm ensures stable readings from high-resistance pH electrodes.
• Selectable output via jumper: 0-10 V or 4-20 mA for flexible connectivity.
• Galvanically isolated output reduces interference in process control loops.
• Panel mounting with IP65 front protection withstands harsh conditions.
• Wide power supply range: 12-30 V DC (0-10 V output) or 15-30 V DC (4-20 mA output).

Who it suits

This transmitter is ideal for system integrators, OEMs, and plant operators who already use a separate display or PLC for readout. It accepts combined pH electrodes with a BNC connector and an MP reference/ground connection, making it compatible with a broad range of sensors. The device supports 2-point calibration (pH 7.0 and pH 4.0/10.0) and offers manual or automatic temperature compensation via an external Pt1000 sensor (not included).

Key specifications

• Measurement range: 0.00 to 14.00 pH
• Accuracy: ±0.02 pH
• Electrode connection: BNC socket (pH electrode), MP (reference/ground)
• Operating temperature: 0 to 50 °C
• Storage temperature: -20 to 70 °C
• Housing material: ABS plastic
• Panel cutout: 45.5 x 66.5 mm (H x W)
• No display – transmitter only

How to use

Mount the transmitter into a panel cutout of 45.5 x 66.5 mm and secure it. Connect the pH electrode to the BNC socket and the reference/ground to the MP terminal. Set the desired output type (0-10 V or 4-20 mA) using the internal jumper. Power the unit with 12-30 V DC for voltage output or 15-30 V DC for current output. For temperature compensation, connect an external Pt1000 sensor (not included) and configure the compensation mode. Perform a 2-point calibration with standard pH 7.0 and pH 4.0 or 10.0 buffers.

Our verdict

A reliable and accurate pH transmitter for industrial applications where a separate display is not required. Its high input impedance and flexible output make it compatible with a wide range of pH electrodes and control systems. For best results, use high-quality shielded cables and calibrate regularly to maintain accuracy.