measuring principle
The ammonia nitrogen concentration was measured by the ion-selective electrode method. The ammonia ion selection electrode directly detects the ammonium ion in the water environment to determine the concentration of ammonia nitrogen. The pH electrode was used as the reference electrode to obtain better stability.
Because the dissolution of the measurement result of the sensor is disturbed by the potassium ion, so when the concentration of the potassium ion in the water is high, the potassium ion compensation is needed.
Ammonia nitrogen sensor consists of ammonium ion selective electrode, potassium ion (optional), pH electrode and temperature electrode. These parameters can correct the measurement value of ammonia nitrogen to each other and realize multi-parameter measurement.
functional characteristics
Digital sensor, strong anti-interference ability, the transmission distance is long;
Standard digital signal output, which can be integrated and networked with other devices without a transmitter;
Sensor site installation is convenient and fast, to achieve plug and play;
Sensor power supply positive and negative electrode reverse connection protection, sensor RS485 A / B terminal misconnection power supply protection;
Simple use, reliable results, interface operation instructions can reduce operation errors;
Set up a visual alarm system to provide important alarm functions;
The controller can achieve wall mounting / panel mounting / clip mounting.
Typical application
Monitor the nitrification treatment, aeration tank, industrial processes and ammonia nitrogen values in river water.
| Sensing technical parameter |
| measuring range |
(NH4N):0.1~1000 mg/L |
| (NO3N):0.5~1000 mg/L |
| (K+):0.5~1000 mg/L |
| (CL-):3~1000 mg/L |
| (F-):0.5~1000 mg/L |
| PH:5-10 tempreture：0~40℃ |
| resolution ratio |
Ion parameters：0.01mg/L
tempreture：0.1℃
ph：0.01 |
| measurement accuracy |
Other ion parameters :± 10% of the measured value or ±0.2 mg/L Temperature :± 0.5℃ pH:±0.1 pH |
| repeatability |
±5% or 0.2mg/1 Max |
| communication protocol |
MODBUS RS485 |
| storage temperature |
0 to 50 ° C (no freezing) |
| working temperature |
0 to 40 ° C (no freezing) |
| size |
55mm×342mm(diameter × length) |
| weight |
<1KG |
| level of protection |
IP68/NEMA6P |
| cable length |
0 m cable is standard and can be extended up to 100 m |
Controller parameters
| Model |
MDS-KP500 |
| Display |
4.3 inches, 480*800 resolution, 262K color, IPS screen, wide viewing Angle, with backlight |
| |
Capacitive touch screen with three protection processes (moisture-proof, mildew proof, salt spray proof) |
| Display size |
95.0mm*53.9mm |
| Measuring range |
-99999.0000~99999.0000 |
| Password Protection |
The default password is 0000 |
| Compatible sensor |
Digital sensor |
| Mounting method |
Disk mounting (with chassis), wall-mounted mounting |
| Alarm relay |
2 relays can set high and low alarm |
| Current output |
2 isolated 4-20mA, maximum load 750Q, can be set |
| Communication port |
RS485 Modbus RTU |
| Memory backup |
All user Settings are stored indefinitely in EERPOM |
| historical data |
The storage capacity of 8000 points is recorded at a 5-minute interval |
| Operating environment |
-10~+50℃,0~95% relative humidity, no condensation |
| Storage environment |
-20 to +70 ° C,0 to 95% relative humidity, non-condensing |
| The power supply |
12V±10% |
| Power consumption of the instrument |
less than 6W |
| Instrument size |
144X145X85(mm) |
| Protection class |
IP65 |
