[Main function] The water level sensor can record the minimum/maximum record of the water tank level. If it is installed on the top of the water tank, the transmitter will quickly and accurately measure the water level through the ultrasonic sensor, and the temperature through the thermal sensor.[Convenient] The screen can display the temperature in the box ( or ) and the temperature of the water tank ( or ) at the same time. The receiver can stand on the table or hung on the wall, which is very convenient for daily use.[Wide Range] Indoor temperature rang 0 60; outside temperature rang -40 60; temperature accurac 1. Water level measurement rang 0 15m, resolutio 0.01m, accurac +/- 0.03M.[Multi-purpose] Ultrasonic tank level gauge can display the room temperature, temperature and water temperature (represented by a bar graph of 10 elements). You can save min/max records and set alarms for specific water levels (high/low) or emptying.Effective distance of 1 foo 30m/98.The multifunctional water level sensor is easy to install and use, and can detect water tank depth, water tank temperature, indoor temperature, etc. This is a convenient water tank sensor.characteristiThe level gauge monitors the level of the tank and displays it in a 10-element LCD bar graph.It can keep the minimum/maximum record of the liquid level of the storage tank.Supports tank high/low alarm and tank liquid empty message.The internal temperature (H or ) and the tank temperature (H or ) are displayed at the same time.The receiver can stand on the table or hung on the wall.specificatioMain materia plasticColo white + blackIndoor temperature rang 0 60External temperature rang -40 60Temperature accurac 1Water level measurement rang 0 15mResolutio 0.01mAccurac 0.03mTransmission frequenc 433 MHzTransmission rang 100 meters (300 feet) in an open areaTransmission interva if the level changes, it is 30 seconds; if the level does not change, it is 3 minutesReceiver batter 2 * AA 1.5V LR3 alkaline batteries (not included)Transmitter batter 6 * AAA 1.5 V LR6 alkaline batteries (not included)Battery lif at least 12 months for receiver and 12 months for transmitterReceiver siz 105 * 93 * 25mm / 4.1 * 3.7 * 1.0inReceiver weigh 93g/3.3ozTransmitter siz 155 * 95 * 65mm / 6.1 * 3.7 * 2.6inTransmitter weigh 125g/4.4ozLCD siz 66 * 45mm / 2.6 * 1.8inPacking siz 165 * 110 * 105mm / 6.5 * 4.3 * 4.1inPackage weigh 288g/10.2ozpacking lis1 *Water level sensor transmitter1 *Indoor receiver2 * Screw