Introduction

The online blue-green algae sensor uses the principle of fluorescence method, which is more efficient and faster than the traditional manua counting method, and can be monitored in real time online. The senso has better repeatability and stability. With automatic cleaning brush, it can eliminate air bubbles and reduce the impact of contamination on the measurement, make the maintenance cycle longer, and maintain excellen stability for long-term online use It can play an early warning role on algae reproduction.

Features

★ Digital sensor, RS-485 output, support MODBUS
★ With automatic cleaning brush to prevent contamination and eliminate air bubbles
★ Direct measurement, simpler than traditional manual counting method
★ Continuous online monitoring, real-time control of water quality dynamics
 

Technical parameter

2,Preparation

• First take 0.1g of rhodamine B solution into 1000mL reagent bottle A, then add DI water or distilled water to 1000mL and shake well.
• Take 1mL of the above solution into 1000mL reagent bottle B, and then add DI water or distilled water to 1000mL and shake well. The solution concentration of reagent bottle B is 100 ppb.
• The prepared solution should be used within 24 hours.

3,Use

Rhodamine B shows that the fluorescence intensity is inversely proportional to temperature. Use 100 ppb rhodamine B standard solution. To properly set the sensor to ensure the sensitivity of algae blue-green algae at 20 ° C, enter the calibration value according to the temperature standard corresponding to the table below. (The table below shows algae blue-green algae as a function of temperature approximately equal to 100 ppb rhodamine B)
 

Note: The calibration using rhodamine B standard solution is only an approximate value. To ensure accurate readings, the fluorescence readings obtained on site must be linked to the results obtained from the extraction analysis of the above samples. Yushan used Rhodamine B (Item # 70301027) from Keystone.

Warning: Rhodamine B is listed as a substance that may cause carcinogenesis / induction of organism mutations. Gloves must be worn during operation.

Maintenance methods and common problems Maintenance schedule and method

I. Maintenance schedule

Online blue-green algae sensor with automatic cleaning brush can be automatically cleaned without frequent cleaning.
 

2. Maintenance method Sensor maintenance

• External surface of the sensor: Clean the external surface of the sensor with tap water. If debris remains, wipe it with a moist soft cloth. For some stubborn dirt, you can add some household washing solution to the tap water to clean it.
• Check the cable of the sensor: the cable should not be tightened during normal work, otherwise the internal wires of the cable will be easily broken and the sensor will not work properly.

3) Check whether the measurement window of the sensor is dirty and whether the cleaning brush is normal.

• Check the sensor's cleaning brush for damage.
• 18 months of continuous use, need to return to the factory to replace the dynamic sealing device.

Cable Definition

Power information

The power supply must be DC 5-12V +/-5%, current <50mA

Cable information

4 wire AWG-24 or AWG-26 shielding wire. OD=5mm
 
1, red line - power supply (VCC)
2, white line - 485 data _B (485_B) 3, green line --- 485 data _A (485_A) 4, black line --- ground (GND)
5, bare line shielding layer