With great accuracy, the A20TR can record temperature, MLSSS, SS, and turbidity online. It is a complicated chip. You can mount the device on two panels or walls, it has automated cleaning connections for electrodes, you can set the temperature directly or automatically, it has several relay alerts, and you can switch between Chinese and English interfaces. It is used to keep an eye on solution parameters in the food, chemical, pharmaceutical, electrical, water supply, and local sewage treatment industries because it is stable, easy to use, and very good at blocking interference.
★★★★★
Features
- Diverse languages, factory standard Chinese interface, switchable English interface
- Multiple temperature compensation options, manual/automatic temperature compensation available
- A set of 4-20mA outputs (optional with two sets of 4-20mA outputs or RS-485 communication), corresponding to turbidity/suspended solids/sludge concentration values or temperature
- Three sets of relays can switch between high and low points freely, and the hysteresis can be adjusted freely to avoid frequent on-off of the relays
- Default provision of a set of electrode automatic cleaning device contacts
- Password management function to prevent misoperation by non professionals
- Menu prompt function, easy for users to operate
Parameters
| Category | Specifications |
|---|---|
| Measurement Parameters | Turbidity, Suspended Solids (SS), Sludge Concentration (MLSS), Temperature |
| Range & Accuracy | Turbidity range: 0-20NTU / 0-400NTU / 0-4000NTU (customizable); Accuracy: ±1.0%FS; Resolution: 0.01NTU |
| Core Performance | Stability: ±1.0%; Temperature compensation: 0-100℃ (manual/automatic, PT1000/NTC10K compatible) |
| Power & Signal | Power supply: AC220V or DC24V; Power consumption: ≤7W; Signal output: 1 set of 4-20mA (optional 2 sets or RS485 Modbus-RTU), load up to 500Ω |
| Alarm Output | 3 groups of relays (3A/250V AC), freely switchable between high/low points, adjustable hysteresis; 1 set of electrode auto-cleaning contact |
| Physical Specifications | Dimension: 144×144×115mm (H×W×D); Mounting hole size: 138×138mm; Operating environment: 0-60℃, ≤85%RH |
| Standard Configuration | Host: A20TR; Turbidity electrode: KSA-320/TD-830; Mounting accessory: PP1020-200 (submersible optional) |
Core Highlights
- Combined monitoring of turbidity, SS, sludge concentration, and temperature without stacking sensors, which saves room and money and makes sure that all the data is in sync.
- It can be mounted on the wall (with 4 M5 screws) or on a panel (with reserved 138 × 138mm holes), so it can be used in a variety of placement situations, such as on walls or in distribution boxes.
- It gives accurate and steady output with a measurement accuracy of ± 1.0% FS, a resolution of 0.01NTU, and digital filtering every 5/10/20 seconds to lower data instability.
- Alarms and upkeep that are flexible: Three groups of relays support eight alarm types, such as high point, low point, interval, and more. The hysteresis values can be changed so that actions aren’t needed too often. Electrodes clean contacts automatically, which means less maintenance needs to be done by hand.
Featured Applications
- Municipal water affairs: monitoring of turbidity/SS in the inflow and outflow of urban sewage treatment plants, regulating MLSS concentration in biochemical tanks, and tracking water quality in water supply plant pipelines;
- Industrial production: Control of suspended solids in process water for the chemical, food, and pharmaceutical industries, monitoring of circulating water turbidity and water quality maintenance for the power industry;
- Environmental monitoring: Multi parameter compliance monitoring of industrial wastewater discharge, real-time control of water quality at the centralized sewage treatment station in the park.
Daily maintenance and precautions
Installation and operation points
- Installation requirements: A 138 × 138mm hole should be reserved for panel installation and secured with a fastener; Wall mounted installation is fixed to the wall with 4 M5 screws; The electrode needs to be paired with a bracket/flow cup, and the back end thread should be wrapped with waterproof tape. The cable extension should not exceed 30 meters.
- Wiring specifications: Red=24V+, Black=24V -, Green=485A, Yellow=485B; 4-20mA version adds purple/brown (+), white (-), be sure to turn off the power before wiring.
- Operation process: The default password is 0000, and the language, date, and backlight duration can be set through the panel buttons; The sensor supports 10 point calibration, digital filtering mode can be selected according to water quality fluctuations, and temperature compensation supports automatic (ATC) or manual (MTC) switching.
Daily maintenance and troubleshooting
- Thoughts on maintenance: To keep things clean, clear the input and exit pipes, as well as the electrode light window and flow cell. If the measurement mistake is big, you should calibrate quickly. Some connections keep interference from happening.
- RS485 connection doesn’t work? Check the wiring one more time, and make sure the power source works with the parameters for communication. When electrodes are dirty, they raise the turbidity level too much. If something leaks, check the waterproof seal and keep the water flow at the recommended level.
Technical Support
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A20TR has the core advantages of multi parameter integration, dual installation adaptation, and high precision stability, synchronously covering turbidity SS、 Monitoring of sludge concentration and temperature. Its intelligent operation, flexible alarm and automatic cleaning functions significantly reduce operation and maintenance costs.
Standardized signal output can easily interface with automatic control systems, adapt to the continuous monitoring needs of multiple industries, and provide reliable data support for water quality compliance and process optimization. It is an efficient and practical multi parameter monitoring preferred choice.
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