Online suspended solids monitoring device

Online suspended solids monitoring device

Water containing soil, dust, fine organic matter, and other microorganisms and colloids can cause turbidity in the water. The light waves emitted by the transmitter on the sensor are absorbed, reflected, and scattered by the measured object during transmission. Some of the transmitted light can be directed towards the detector in the 180 ° direction, while some of the scattered light can be directed towards the detector in the 90 ° direction. The intensity of light received by detectors in the 180 ° and 90 ° directions is related to the suspended solids in the measured wastewater. Therefore, by measuring the intensity of transmitted and scattered light, the suspended solids in the wastewater can be calculated. This product uses RS485 interface to communicate with digital sensors, with high data accuracy and strong anti-interference ability. It can directly control the calibration and automatic cleaning functions of digital sensors.

Key Features:

◇ Large screen dot matrix LCD display, supporting Chinese and English menus (switching between each other).

Built in bubble elimination system (flow type) to improve measurement accuracy and stability.

Good reproducibility, unaffected by sample flow rate and pressure (input type).

Adopting a stable invisible near monochromatic infrared light source, it avoids the interference of chromaticity in the liquid and visible light from the outside on the sensor measurement; And built-in photometric compensation to improve measurement accuracy.

◇ It has a water storage function to ensure that there is a water sample (circulating type) in the internal circulation groove of the sensor for 24 hours.

◇ Adopting detection technology to avoid interference from external light, with strong anti-interference ability (submerged).

Using quartz glass lenses with high transmittance on the optical path ensures more stable emission and reception of infrared light waves.

Communication function (optional): Equipped with RS-485 communication interface (partially compatible with MODBUS protocol), the corresponding value of 4-20 mA current output can be set arbitrarily.

◇ Optoelectronic isolation 4-20mA current output.

◇ The hysteresis can be set arbitrarily to avoid frequent actions of the switch relay, and there is a function to set the switch value to turn off and off.

◇ Adopt multi-point correction method.

◇ The automatic cleaning interval can be freely set (with sensor support).

Watchdog function: Ensure that the instrument panel does not crash.

The core components are all from foreign brands.

◇ Power failure protection>10 years.

Online suspended solids monitoring devicetechnical indicators

1. Measurement range: Measurement range: 0-500mg/L (flow-through), 0-2000mg/L (submerged), customizable range (adaptive according to sensor range)

2. Resolution: 1mg/L

3. Accuracy: ± 2% FS

4. Repeatability: ± 1.0%

5. Control interface: Two sets of ON/OFF relay contacts, divided into high and low point alarm signal photoelectric isolation outputs.

6. Signal isolation output: Optocoupler isolation protection 4-20mA signal output

7. Relay: Relay hysteresis can be set arbitrarily, relay load 3A 220VAC

8. Working conditions: ambient temperature of 0-60 ℃, relative humidity ≤ 90%

9. Output load: Load ＜ 750 Ω (4-20mA)

10. Working voltage: Instrument: 220VAC 10%, 50/60Hz or DC24V or DC12V

AC 220V 10% (circulating type), DC 12V (submerged type)

11. Size: 100 × 106 × 168mm (instrument) 380 * 270 * 80mm (flow type) 210 * φ 50mm (submerged type)

12. Hole size: 92 * 92mm

13. Weight: 0.9kg (instrument) 2.0kg (submerged) 3.5kg (flow-through)

Protection level: IP65 (instrument) IP68 (sensor)