application area

The ion selective sensor is directly installed in the activated sludge tank of the sewage treatment plant for measurement, without any sample pretreatment or sample transmission. The entire measurement system includes sensors and transmitters: the sensors contain electrodes, and the transmitters come with display and operation units. Sensors are used to monitor nitrate concentration: at the outlet of sludge tanks and primary sedimentation tanks.

Instrument features

◆ No need for sample pretreatment, directly measure nitrate and nitrogen

Chloride ion measurement is optional and can also compensate for high concentration disturbances

◆ No need for reagents, low cost of use

Range: 0.1-1000 mg/l NO3-N

◆ Directly installed at the edge of the pool, without the need for a liquid collector or sample transfer pump

Compressed air cleaning is optional, with low maintenance costs

Replacing the laminated cap every 6 months effectively extends the service life of the electrode

Equipped with RS-485 standard MODBUS communication protocol, it can directly communicate with digital devices

System connection (MB-300-ION-3RS serial only)

Two sets of programmable outputs (MB-300-ION-3 serial only)

Technical Parameter

The input measurement variable depends on the sensor type:

Nitrous nitrogen: NO3-N, NO3- [mg/l] Nitrous nitrogen: 0.1~1000 mg/l Measurement range

Chloride ion: Cl - [mg/l] Chloride ion: 1-1000 mg/l

temperature

performance parameter

Response time t90: Nitrous nitrogen:<2 min. Chloride ion:<2 min

Maximum measurement error (± 5% of the measured value) ± (0.2 mg/l)

± 3% of repeatability display value

Correction mode: two-point or three-point correction, offset value correction (thirteen sections available for selection)

Input impedance>1012 Ω

Relay output with two sets of ON/OFF contact outputs, high and low points, and hysteresis can be set by any program, 240VAC/0.5A

◆ Analog output 1 or 2 channels of 4-20mA analog signal output, users can set the corresponding output value, load 500 Ω

◆ Environmental temperature range -20 .. 50 °C (-4 ... 120 °F)

◆ Storage temperature 2 .. 40 °C (36 ... 100 °F)

◆ Protection level IP65

Electromagnetic compatibility (EMC) interference emission and anti-interference emission both comply with EN 61326 and

NAMUR NE21 standard

Process temperature range 2 .. 40 °C (36 ... 100 °F)

Maximum allowable overpressure value for process pressure: 400 mbar (160 inH2O)

The pH value of the medium

Nitrogen nitrate: pH 2~12

Chloride ion: pH 1-10