HD-300 (Two-Wire Transmitter)


  • Membrane type polarography method
  • Span calibration by air preceded by auto-zeroing (Electrical auto zeroing function)
  • Self-diagnosis of membrane damage and infiltration into the probe
  • On-site membrane replacement as well as whole sensor replacement

Hergestellt von HORIBA Advanced Techno


Measuring method

Membrane type polarography method

Measuring range

Dissolved oxygen: 0 to 20 mg/L   Resolution: 0.01 mg/L
Saturation ratio: 0 to 200%   Resolution: 1%
Temperature: 0 to 50˚C   Resolution: 0.1˚C


Dissolved oxygen concentration: ±0.5% full-scale or less, Temperature: ±0.5˚C (for equivalent input)


Dissolved oxygen concentration: ±0.5% full-scale or less, Temperature: ±0.5˚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 50˚C

Ambient temperature

-20 to 60˚C

Temperature measurement element

Pt 1000 (0˚C) (Built into DO-1100 probe)

Calibration method

Atmospheric calibration or saturated liquid calibration

Self-diagnosis function

Calibration error, Sensor 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

Compatible sensor

Sensor: 5505, 5510   Probe: DO-1100


Approx. 4 kg

Equipment protected

CE marking, FCC rules