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(Dual-Channel Version, User-Configurable for pH, Oxygen)
The M300 Series dual-channel transmitters for pH/ORP, oxygen and conductivity measurements combines robustness with ease of use. Its versatility and solid measurement performance makes it the ideal choice for light industrial applications. The M300 transmitter is designed for comfortable operation: from the large display to the easily accessible wiring terminals to the plain text interface and quick setup menu. With the ISM (Intelligent Sensor Management) version, configuration and commissioning become substantially easier.

With its innovative USB port, the M300 is open to the future – for remote configuration, data logging or software upgrade. M300 transmitters are also available as single-channel versions.

  • Each channel can be user-configured for pH, oxygen and conductivity.
  • PID controller with pulse length, pulse frequency or analog control.
  • Pre-calibrated ISM sensors can be swiftly exchanged at the line and ensure reduced maintenance and fast commissionin.
Measured units pH, mV and temperature / D.O. saturation or concentration and temperature / conductivity or resistivity and temperature
Power supply 100...240 V AC, or 20...30 V DC
Protection 1/4DIN: IP65 (front); 1/2DIN: IP65/NEMA 4X
Current output 0/4 to 20 mA, 22 mA alarm
Relays 2-SPDT mechanical rated at 250 VAC, 3 Amps; 2-SPST mechanical rated at 250 VAC, 3 Amps; 2-Reed rated at 250 VAC or DC, 0.5 Amp switching
Temperature inputs Pt1000 (Pt100 with adapter)
Mounting options panel and wall mounting
Measurement range pH: -1...15, mV: -1500...+1500; D.O. saturation range: 0...500%, D.O. concentration range: 0.00...20.00 ppm (mg/l); 2-electrode sensor: 0.02 to 2000 μS/cm (500 Ωxcm to 50 MΩxcm); 4-electrode sensor: 0.01 to 650 mS/cm (1.54 Ωxcm to 0.1 MΩxcm)
Sensor inputs pH or mV / DO sensors / 2- or 4-electrode conductivity sensors/ ISM version: pH or DO ISM sensors
Service Interface USB port, type B connector