application area

Ion selective sensors directly installed in sewage treatment plants

Measurement is conducted in a sludge tank without the need for any sample pretreatment or sampling

Product transmission. The entire measurement system includes sensors and transmitters:

The sensor contains electrodes, and the transmitter comes with a display and operation unit.

Sensors are used to monitor ammonia nitrogen concentration: sludge tank, primary sedimentation tank outlet

Instrument features

◆ No need for sample pretreatment, directly measure ammonia nitrogen

Potassium ion measurement is optional and can also compensate for high concentration interference

◆ pH measurement and compensation, no need for reagents, low cost of use

◆ Range: 0.1-1000 mg/l NH 4-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-2RS serial only)

Two sets of programmable outputs (MB-300-ION-2 serial only)

Technical Parameter

The input measurement variable depends on the sensor type and measurement range

Ammonia nitrogen: NH4-N, NH4+[mg/l] Ammonia nitrogen: 0.1~1000 mg/l

◆ Potassium ion: K+[mg/l] Potassium ion: 1-1000 mg/l (optional)

◆ pH value and temperature

performance parameter

Response time t90: Ammonia nitrogen:<2 minutes

Potassium ion:<2 minutes

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 condition

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

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

◆ Protection level IP 65

Both electromagnetic compatibility (EMC) interference emission and anti-interference emission comply with

EN 61326 and NAMUR NE21 standards

Process conditions

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

Ammonia nitrogen: pH 5~8.3 (without pH compensation) pH 5~10 (with pH compensation)

Potassium ion: pH 2~12