1. Introduction

The TW-5628 suspended solids sludge concentration meter (input type) is an intelligent specialized instrument that adopts embedded technology, integrates signal acquisition, signal processing, display, and data transmission, with high measurement accuracy and easy operation. This instrument is based on the combined infrared absorption scattering light method and can continuously and accurately measure the concentration of suspended solids/sludge using the ISO7027 method. According to ISO7027 infrared double scattering light technology, suspended solids/sludge concentration values are determined without being affected by chromaticity. According to the usage environment, it can be optionally equipped with self-cleaning function. Stable data and reliable performance; Built in self diagnosis function to ensure accurate data; Installation and calibration are simple. This product is widely used for monitoring suspended solids/sludge concentration in sewage treatment plants, waterworks, water stations, surface water, aquaculture, industry and other fields.

2. Characteristics

1) Adopting a 2.8-inch 12864 dot matrix LCD display;

2) Adopting isolated transmission output, with less interference;

3) Adopting isolated RS485 communication;

4) Can perform measurement of DO/SAT, temperature measurement, upper and lower limit control, transmission output, RS485 communication;

5) Can set high and low alarm functions, as well as hysteresis;

6) Can set buzzer and LCD backlight switch functions;

7) Language selection is available, currently supporting both Chinese and English;

3. Technical indicators

1) Display: Chinese and English display, 128 × 64 dot matrix LCD;

2) Measurement range: (0.01~20000) mg/L, (0.01~45000) mg/L, (0.01~120000) mg/L

3) Minimum resolution: 0.01 mg/L;

4) Basic error: less than ± 5% of the full range (depending on sludge homogeneity)

5) Sample flow rate: ≤ 2.5m/s, 8.2ft/s;

6) Sample pressure: ≤ 0.4MPa;

7) Environmental temperature: (0-45) ℃

8) Environmental humidity: not exceeding 90% RH (without condensation)

9) Storage temperature: (-15~65) ℃

10) Output type: (4-20) mA current transmission output;

11) Loop resistance: not greater than 750 Ω;

12) Communication protocol: Standard MODBUS-RTU (customizable);

13) Alarm relay: AC250V, 3A;

14) Electrode waterproof rating: IP68/NEMA6P

15) Cleaning function: optional

16) Dimensions: 100mm × 100mm × 150mm

17) Opening size: 92.5 mm × 92.5 mm

18) Power supply: AC220V ± 10%, 50Hz/60Hz;