HP-300 (Two-Wire Transmitter)


  • Improved single-touch calibration for greater ease of use
  • Calibration history display
  • New pH electrode lineup

Fabriqué par HORIBA Advanced Techno


Measuring method

Glass electrode method

Measuring range

pH: 0 to 14 pH   Resolution: 0.01 pH
Temperature: 0 to 100˚C   Resolution: 0.1˚C


pH: ±0.03 or less   Temperature: ±0.3˚C (for equivalent input)


pH: ±0.03 or less   Temperature: ±0.3˚C (for equivalent input)

Transmission output

4 to 20 mA DC   Input/output insulated type
Maximum load resistance 600 Ω

Contact input

One point   Contact format: Non-voltage a contact
Contact function: Transmission output is held for closed contact input.

Temperature compensation range

0 to 100˚C

Ambient temperature

-20 to 60˚C

Temperature compensation element

Pt 1000 (0˚C)
Positive temperature sensitive resistor element: 500 Ω (25˚C), 6.8 kΩ (25˚C), 10 kΩ (25˚C)

Calibration method

Automatic or manual calibration

Self-diagnosis function

Calibration error, Electrode diagnosis error, Transmitter malfunction

Power supply

24 V DC (operational voltage range: 21 V to 32 V DC)
Power consumption 0.6 W or less


Outdoor installation type: IP65 protection level
Mounting method: 50A pole or wall mounted
Case: Aluminum alloy
Mount fitting/hood: SUS304


Approx. 4 kg

Equipment protected

CE marking, FCC rules