HD-200FL

Field-installation type optical dissolved oxygen meter (DO meter)

Optical sensors improve ease of maintenance.

Ideal for the management of aeration tanks at facilities such as wastewater treatment plants and industrial wastewater treatment facilities. Optical sensors do not require concerns about electrolyte replacement or membrane breakage. The system also offers further enhanced functionality, such as automatic recognition of membrane-specific coefficients characteristics when the sensor cap is replaced.

Abteilung: Process Water
Produktionsfirma: HORIBA Advanced Techno Co., Ltd.

IC built-in memory sensor cap

Automatic recognition of membrane-specific coefficients eliminates the need to input them when replacing the sensor caps (fluorescent film).

Possible to be combined with a float-type holder

Self-cleaning action uses flow velocity of measured liquid preventing accumulated contamination.  The shape of the sensor prevents dirt and floc from clinging to the sensor part.

Possible to be combined with ultrasonic cleaners

Can be combined with an ultrasonic cleaner, which is effective for use in aeration tanks.  Furthermore, since the sensor is designed to be dropped into the holder, it offers ease of maintenance.

Strengths of the sensor

The sensor offers a longer lifespan compared to other measurement methods. Moreover, with an optical sensor, there are no concerns about membrane damage, and the membrane can be easily replaced by exchanging the entire cap. Three cleaning methods are available (water jet, air jet, and ultrasonic).

Indication converter specifications

Model HD-200FL
Measuring method Optical (fluorescent)
Measuring range DO: 0 to 20 mg/L      Resolution: 0.01 mg/L
Saturation: 0 to 200%    Resolution: 0.1%
Temperature: 0 to 50°C   Resolution: 0.1°C
Repeatability Within ± 1% of full scale
Linearity Within ±2% of full scale
Transmission
output		 2 points 4 mA to 20 mA DC output isolated type Maximum load resistance 900 Ω
　Range 1: DO concentration: Freely selectable within the measurement range
　Range 2: Temperature: Freely selectable within the range from -10.0 to 110.0°C
　Alarm: Burnout function (3.8 mA or 21 mA)
　Hold: Selectable from previous value hold, optional value hold
Contact
output		 3 points Dry contact output Relay contact, SPDT (1c)
　Signal R1, R2: upper limit alarm, lower limit alarm,
        hold, Cleaning (selectable)
      FAIL : Alarm
　Control operation Control width: 0.02 to 4.00 mg/L (±0.01 to ±2.00 mg/L)
On cleaning
output		 1 point Wet contact output (connecting power supply voltage output) Relay contact, SPST (1a)
　Contact function: Solenoid Valve Control
External input 1 point Contact shape: Open connector dry ‘a’ contact
　Contact function: Cleaning Unit Control
Communication function RS-485 2-line, insulated input/output (transmission output is not insulated)
Temperature
compensation range		 0 to 50°C
Temperature
compensation device		 Thermistor
Calibration method Atmosphere span calibration, zero liquid (sodium sulfite) calibration, span liquid (atmosphere saturation liquid) calibration
Self-diagnosis function Calibration error, sensor diagnosis error, converter alarm
Operating temperature range -20 to 55°C (Should not be frozen)
Power supply 90 to 264 V AC 50/60 Hz Power consumption: 15 VA (max)
Structure IP65 : 50 A pole or wall mounting
Case: Aluminum alloy Mounting brackets, hood: SUS304
Mass Main unit body: Approx. 3.5 kg   Hood, mounting brackets: Approx. 1 kg
Regulatory compliance CE marking, FCC
Compatible sensor DO-2000

＊1     When extending the sensor cable, transmission cable, or contact input cable 30 m or more, the CE marking EMC directive surge test does not apply.
＊2     An arrestor (inception voltage: 400 V) is mounted on the unit for transmission output, contact input, and communications. However, an optimal surge absorber should be installed on the connecting line depending on the surrounding environment, equipment setup, externally connected devices, etc.

Probe specifications

Model DO-2000
Measurement principles Optics (fluorescence)
Sample water 0 to 50°C
Wetted material SUS316、NBR、PVC
Response time 90% response: Within 30 s  95% response: Within 60 s
Mass Approx. 3.0 kg (incl. 10 m cable)

Sensor cap specifications (replaceable)

Model 5700
Wetted material NBR, PMMA
Mass Approx. 5.0 g
Membrane memory Built-in memory in the membrane unit, automatic recognition
Size: 5.24 MB
〈Catalog〉Industrial Water Quality Measuring Instruments

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