Features Level Monitor: The water tank level gauge has a wide measuring range. With a wide measuring range from 0 to 15 meters, the level gauge can record the maximum and minimum level of liquid. High Accuracy: High accuracy of up to 0.03 meters with data updated every 30 seconds or 3 minutes ensures easier tank control. Real-time display of the data of the current stage with a small error. Long distance: In open areas, the transmission distance can reach 100 meters, allowing observation from a long distance. Don't worry about long distance and inaccurate monitoring. Alarm Function: The water tank level gauge supports alarm function when the water tank level is too high, too low or empty, thus making the operation safer. You can store min/max records and set alarms for specific water levels or empty water levels. Convenient use: The tank water level sensor is also equipped with a thermometer, timer, etc., adding more convenience to work. You can hang the receiver on the wall or take out the stand and place it on the kitchen bench, table or desk. Specification: Item Type: Water Tank Level Gauge Product material: ABS Data: The fuel tank level is updated every 30 seconds or 3 minutes. Indoor temperature range: 0~50℃ Outdoor temperature range: -40~60℃ Temperature accuracy: ±1℃ Water level measurement range: approx. 0 ~ 15 meters/0 ~ 49.2 feet Resolution: Approx. 0.01 meters Accuracy: approx. ±0.03 meters Transmission frequency: 433MHz Transmission range: approx. 100 meters/328.1 feet (open area) Applicable liquid type: For all non-corrosive liquids. Batteries: Shipped without batteries, use 6 1.5V AAA batteries and 2 1.5V AA batteries. Package list: 1 x main machine 1 x Water Tank Level Gauge 1 user manual Note: It can not be used for cement, concrete water tanks, it can only be used for water tanks. Package List 1 x Main Machine 1 x Water Tank Level Meter 1 x User Manual