HD-200 (Four-Wire Analyzer)


  • Self-diagnosis of membrane damage and infiltration into the probe
  • On-site membrane replacement as well as whole sensor replacement
  • Span calibration by air preceded by auto-zeroing (Electrical auto zeroing function)
  • Extensive interfaces (2-channel transmission output, RS-485 compatible, 4-relay output)

Fabriqué par HORIBA Advanced Techno


Measuring method

Membrane type polarography method

Measuring range

Dissolved oxygen concentration: 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

Two points 4 to 20 mA DC   Input/output insulated type   Maximum load resistance 900 Ω

Contact output

Three points Non-voltage contact output Relay contact, SPDT(1c)
 Contact function R1, R2: Selectable from upper limit alarm, lower limit alarm, ON/OFF control, transmission output hold operation, cleaning output
  FAIL: Malfunction alarm
 Control operation Control range: 0.02 to 1.00 mg/L (±0.01 to ±0.50 mg/L)

Contact input

One point   Contact format: Open collector non-voltage a contact
 Contact function: Cleaning operation external input

Communication function

RS-485   Two wire system, Input/output insulated type (not insulated for transmission output)

Temperature compensation range

0 to 50˚C

Ambient temperature

-20 to 55˚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, Analyzer malfunction

Power supply

90 to 264 V AC 50/60 Hz
Power consumption 15 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. 4.5 kg

Equipment protected

CE marking, FCC rules