HD-200FL

現場安裝型光學溶氧計（DO計）

光學感測器提高了維護的便利性。

非常適合廢水處理廠和工業廢水處理設施等設施中曝氣池的管理。光學感測器無需擔心電解質更換或膜破損。該系統還提供進一步增強的功能，例如更換感測器蓋時自動識別膜特定係數特性。

製造商: 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)