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The BME63M001 is a 2-channel TDS sensor for water quality detection module that comes with two TDS probes, the TDS-37. This product offers a TDS measurement range of 0 to 5000 ppm, which is wider than that of other similar products in the market. You can simultaneously monitor the TDS and temperature of two sinks with the two probes.
TDS (Total Dissolved Solids) is a measure of the combined total of organic and inorganic substances contained in water. It can be a general indicator of water quality. The unit of TDS measurement is ppm or milligrams per liter (mg/L). The larger the TDS value, the more dissolved substances in water.
In many consumer products, the TDS value is calculated by measuring the conductivity of water (in uS/cm), which is roughly 1 ppm TDS = 2uS/cm. Using parallel cylindrical electrodes with fixed distance as the measuring probe, the probe is placed in water and a voltage is applied between the two electrodes to measure the conductivity.
Factors affecting the accuracy of TDS measurement include water temperature, flow rate, etc. In general, the standard measurement temperature is 25°C. For each 1°C increment, the TDS value increases by about 2%. When measuring TDS, the water temperature is usually measured together for temperature compensation.
To calibrate the BME63M001, it is necessary to prepare a cup of water, a bottle of TDS calibration solution, and a thermometer and uses them to calibrate the conductivity and temperature.
There is a BMCOM on the product to directly connect to BMduino development boards, such as BM53A367A. You can use the product with other development boards, such as Arduino UNO, as well.
| Pin | Pin name | Function |
|---|---|---|
| 1 | NC | - |
| 2 | RX | UART: RX |
| 3 | TX | UART: TX |
| 4 | VCC | Power supply: 3.3V~5.5V |
| 5 | GND | Ground |
| 6 | TDS-CH1 | TDS channel 1 input |
| 7 | TDS-CH1 | TDS channel 1 input |
| 8 | NTC-CH1 | NTC channel 1 input |
| 9 | NTC-CH1 | NTC channel 1 input |
| 10 | NTC-CH2 | NTC channel 2 input |
| 11 | NTC-CH2 | NTC channel 2 input |
| 12 | TDS-CH2 | TDS channel 2 input |
| 13 | TDS-CH2 | TDS channel 2 input |
| BM25S4021-1 | BME63M001 | ESK-TDS-66F3185 | |
|---|---|---|---|
| Operating voltage | 3.1V~5.5V | 3.3V~5.5V | 3.3V / 5V |
| Standby current | < 3μA @5V | < 5μA @5V | - |
| Measurement range | 0~5000ppm | 0~5000ppm | 0~2000ppm |
| Accuracy | 5ppm~5000ppm @25℃: ±5%
5ppm~5000ppm @5℃~60℃: ±6% |
0~2000ppm: ±5%
2000~5000ppm: ±10% |
±5% @25℃, 5.0V |
| Resolution | 0~500 ppm: 0.1ppm
500~1500ppm: 0.5ppm 1500~2500ppm: 5ppm 2500~5000ppm: 10ppm |
0~500 ppm: 0.1ppm
500~1500ppm: 0.5ppm 1500~2500ppm: 5ppm 2500~3500ppm: 10ppm 3500~5000ppm: 25ppm |
- |
| Temperature
measurement range |
0~60℃ | 0~60℃ | 0~60℃ |
| Temperature accuracy | ±0.8℃ | ±1℃ | - |
| MCU | HT66F3185 | HT66F3185 | HT66V3185 |
| Calibration | Has been calibrated
at the factory |
Has been calibrated
at the factory |
Users need to calibrate it
using the TDS workshop |
| HS Code (reference) | 8473.30.00.00-6 |
|---|
