The Slim48 series HD-480 industrial dissolved oxygen meter HD-480


The HD-480 industrial dissolved oxygen meter takes sequential measurements of the concentration of dissolved oxygen, which is an indicator used in the management of activated sludge tanks in waste water processing, and the quality of the water in boilers, or rivers and waterways.
As there is no need to exchange the membrane of the disposable sensor included, it is easy for anyone to use.


  • Exchanging the sensor is a one-touch operation
    The sensor is disposable, and can be exchanged with the touch of a key.
    There is no need for work requiring long experience or expertise, such as exchanging the membrane or refilling the internal fluid, as generally required by other sensors until now.
  • Two types of span correction
    You can choose from two types of span correction: the commonly used saturated fluid correction, and the plain and simple atmospheric correction.
  • Salt adjustment function
    A function which automatically corrects the data based on the salt concentration of the measurement sample has been included.
    This means it can make precise measurements in both freshwater and seawater.
  • Uses lead-free solder
    To reduce the burden on the environment, lead-free solder has been used to mount the components on the printed circuit board.

Hergestellt von HORIBA Advanced Techno


Product name

Dissolved Oxygen Meter



Measurement method

Galvanic cell method

Measuring range

Dissolved Oxygen 0 mg/L to 20 mg/L, 0.01 mg/L resolution
Saturation 0 % to 200 %, 1 % resolution

Temperature 0,µ to 40,µ , 0.1,µ resolution


Within ±0.5 % of the full scale (by equivalent input)


Within ±0.5 % of the full scale (by equivalent input)

Transmission output

4 mA to 20 mA DC, input / output isolated type
Maximum load resistance 900 Ω
Transmission output range: freely selectable within the measurement range

Contact output

Outputs: 2 points
Alarm contact output (R1 and R2)
Contact type: relay contact, SPDT (1c)
Contact rating: 240 V AC, 3 A and 30 V DC, 3 A (resistance load)
Contact function: selectable from upper / lower limit operation (ON / OFF control), alarm, maintenance, and temperature

Calibration function

Air calibration and solution calibration
Salinity compensation (0.0 % to 5.0 %)
Temperature calibration (two points)

Transmission output
hold function

Previous value hold
Optional value hold
  Selectable from the above (However, only the previous value hold is available in the maintenance mode.)

Self-diagnosis function

Calibration failure
Sensor diagnosis
Measuring range error
Converter error

Power supply

Rated voltage 100 V AC to 240 V AC, 50/60 Hz, 10 VA (max.)


Indoor-use panel installation type
Panel: IP65 dust and water proof structure

Protective structure

Panel: IP65 (IEC60529, JIS C0920)

Conforming standards

CE Marking
FCC Rule

External dimensions

48 (W) mm x 96 (H) mm x 115 (D) mm
Case depth: approx. 105 mm


Approx. 400 g

Compatible sensors




5400, 5405