TDS (Total Dissolved Solids) measures how many milligrams of soluble solids dissolved in one liter of water. The measure is expressed in PPM (part per million). In general, the higher the TDS value, the more soluble solids dissolved in water, and the less clean the water is. Therefore, the TDS value can be used as one of the references for reflecting the cleanliness of water.

Thanks to this product, it becomes possible to create your own measurement, collection and data transmission system. It is even possible to use this information to automate water treatment cycles. The TDS probe is waterproof; it can be immersed in water for long time measurement. However, the signal transmitter board is not waterproof.

The VOC (volatile organic concentration) gas sensor is mainly used to detect and measure the concentration of VOC gases such as: Formaldehyde, Acetone. Acetic Acid, Benzene, Toluene, xylene, Butanal, Carbon Disulfide, Methylene Chloride.

The sensor module is based on MS1100 sensor which is semiconductor type sensor product widely used in ventilation equipment, ventilation fans, air filters, hoods, home appliances and other equipment. With high sensitivity and stability, it can detect more than 0.1ppm concentration of VOC gases in air.

This 4 in 1 water quality sensor is a high quality industrial standard sensor that can measure EC (conductivity), TDS (total dissolved solids), Salinity and water temperature. This sensor enjoy high precision, long life and high stability in measurements. The sensor has RS 485 serial interface with 2-meter cable which can be extended to 1000 meter without affecting measured data quality, thanks to RS 485 long distance serial communication interface. It can be integrated with GPRS/4G/WIFI/LORA wireless module.  

Conductivity (EC) is a measure of the ability of water to pass an electric current; it is affected by the presence of dissolved solids such as chloride, nitrate and phosphate. Conductivity can be a very useful indicator that a discharge of some sort has entered a stream, or some other change has occurred. TDS Sensor detects the Total Dissolved Solids (TDS) levels in the water which can be used to indicate the water quality. The Salinity Sensor easily and precisely measures the total dissolved salt content in an aqueous solution. 

This water PH sensor is high quality, high precession, industrial standard water PH sensor. It is designed to be used in industrial applications such as water treatment facilities, rivers, lakes, peverage industry. The PH sensor equipped with 2 meter low noise cable. It is designed for low power consumption, long life and high measurement stability,

PH is a measure of acidity or alkalinity of a solution. It is commonly used to measure the quality of the water or for water monitoring. The pH scale ranges from 0 to 14.