[Main function] The water level sensor can record the minimum/maximum recording of the water tank level. If installed on top of the water tank, the transmitter will quickly and accurately measure the water level through the ultrasonic sensor and the temprature through the thermal sensor. [Convenient] The screen can display the temprature in the boot ( or ) and the temprature of the water tank ( or ) in same time. The receiver can be placed on the table or hung on the wall, which is very convenient for everyday use. [Wide Beach] Internal temprature range: 0 60; Extreme temprature range: -40 60; Temprature specification: 1. Water level measurement range: 0 15 m, resolution: 0.01 m, specification: +/- 0.03 M. [Multi-purpose] The ultrasonic tank level gauge can display ambient temprature, temprature and water temprature (represented by a bar). graph of 10 lments). You can record min/max recordings and set alarms for spcific (high/low) water levels or draining. Effective distance of 1 foot: 30 m/98. The multifunctional water level sensor is easy to install and use, and can detect the depth of the water tank. , temprature of the water tank, internal temprature, etc. This is a convenient water tank sensor. Characteristic: The level gauge monitors the level of the tank and displays it in a 10 lments LCD bar graph. the liquid level of the storage tank. Supports tank high/low alarm and empty tank liquid message. The internal temprature (H or ) and the temprature of the tank (H or ) are displayed at the same time. The receiver can stand on the table or hang on the wall.spcification:Main matrix: plasticColor: white + blackInternal temprature range: 0 60External temprature range: -40 60Temperature specification: 1Water level measurement range: 0 15mRSolution: 0.01mSpecification: 0.03mTransmission frequency: 433 MHzTransmission range: 100 mtres (300 feet) in dgage area Transmission interval: if the level changes, it is 30 seconds; if the level does not change, it is 3 minutes Receiver battery: 2 * AA 1.5V LR3 alkaline batteries (not included) Transmitter battery: 6 * AAA 1.5V LR6 alkaline batteries (not included) Battery life: at least 12 months for the receiver and 12 months for the transmitter Receiver size: 105 * 93 * 25mm / 4.1 * 3.7 * 1.0in Receiver weight: 93g / 3.3oz 2.6 * 1.8in Package size: 165 * 110 * 105mm / 6.5 * 4.3 * 4.1in Package weight: 288g / 10.2oz