HD-200FL Field-installation type optical dissolved oxygen meter (DO meter)

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
Transmission output	2 points 4 mA to 20 mA DC input/output isolated type Maximum load resistance 900 Ω 　Output 1: Dissolved oxygen concentration: Selection from preset ranges or free range input within measuring range. 　Output 2: Temperature: Free setting within a range between -10 and 110°C 　Occasional out for error: Hold or burnout to either 3.8 mA or 21 mA 　Transmission hold: In the maintenance mode, transmission signal is held at the latest value or preset value. In the calibration mode, transmission signal can be alive or held.
Contact output	3 points No-voltage contact output Relay contact, SPDT (1c) 　Signal R1, R2: Selectable from upper limit alarm, lower limit alarm, ON/OFF control, currently holding of transmission output, and cleaning output.(The contact is closed during alarm operation, opened normally and while the power is down.) 　FAIL : Error alarm (Closed in the normal state, opened in the failure state or while the power is down.) 　Control operation Control width: 0.02 to 4.00 mg/L (±0.02 to ±2.00 mg/L)
Cleaning output	1 point AC power control output ( Applied power supply voltage) Relay contact, SPST (1a) 　Contact function: Solenoid valve for cleaning control
External input	1 point Contact shape: No-voltage "a" contact for open collector 　Contact function: External input for cleaning or transmission holding if cleaner is not attached.
Communication function	RS-485 2 wire system, isolated from the input/output circuit Not isolated from transmission circuit
Temperature compensation range	0 to 50°C
Calibration method	Span calibration in the air Zero: Sodium sulte solution Span: Air or DO saturated water
Self-diagnosis function	Calibration error, sensor diagnosis error, converter error
Operating temperature range	-20 to 55°C without freeze
Power supply	100 to 240 V AC ±10% 50/60 Hz Power consumption: 20 VA (max)
Structure	IP65 : Mounted on 50A pole or wall Case: Aluminum alloy (coated with epoxy-denatured melamine resin), 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

scrollable

＊1: The standard for effect on the reading by the electromagnetic eld of the radiated radio frequency and HD-200FL by the conducted interference is within the measured dissolved oxygen value ± 0.4 mg/L.
＊2: When the sensor cable, the transmission cable, or the contact input cable is extended by 30 m or more, the surge test under the EMC Directive for CE marking is not applied.
＊3: An arrester (spark over voltage: 400 V) is implemented for transmission output, contact input, and communication. However, use a most suitable surge absorption element on the connection lines in accordance with the ambient environment, the situation of equipment installed, and the externally connected equipment.

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)