Ultrasonic Water Tank Liquid Depth Level Meter Sensor with Temperature Display Description: Keep an eye on your outdoor water tank from the comfort of your own living room, up to 100m away. Installed at the top of your water tank, the transmitter unit measures the water level using an ultrasonic sensor and temperature using a thermo sensor. You can hang the receiver unit on a wall or pull out the stand and place it on your kitchen bench top, table or desk. View your room's temperature, tank temperature and water level (represented by a 10 elements bar graph). You can store minimum/maximum records and set alarms for specific water levels (high/low) or when empty. Features: This meter monitors tank liquid depth level, and displays on a 10-elements LCD bar graph. It can keep minimum/maximum records of tank liquid level. Supports tank liquid level high/low alarm and tank liquid empty alert. Displays indoor temperature (℉ or ℃) and tank temperature (℉ or ℃) at the same time. The receiver can be put standing on desk or hanging on wall. Specification: Indoor Temperature Range: 0~50℃ Outdoor Temperature Range: -40~60℃ Temperature Accuracy: ±1oC Water Level Measure Rang: 0~15m             Resolution: 0.01m             Accurate: +/-0.03M Transmission Frequency: 433MHZ Transmission Range: 100 meters(300 feet)in open area Transmission Interval: 30s when level changes or 3 minutes when level does not change Receiver Battery: 2X AA 1.5V LR3 Alkaline batteries (Not included) Transmitter Battery: 6X AAA 1.5V LR6 Alkaline or li batteries (Not included) Battery Life: Minimum 12 months for receiver                   Minimum 12 months for transmitter Receiver Size: 108*94*27mm Transmitter Size: 97*68*152mm LCD Size: 66*45mm(3.3 inch) Suitable Liquid Type: All non-corrosive liquid Open Distance: Approx.100M/328.1ftEffective Distance : Approx.30M/98.4ft Package Includes: 1 x Water Level Sensor Transmitter 1 x Indoor Receiver 2 x Screws (Batteries are NOT included) Note:Note that the product is not water proof.1. Install the battery in the battery compartment of the transmitter, do not insert the battery compartment, and insert the battery synchronously after the receiver is set up 2. The liquid level indicator has no data, press the tank key, and the data will be displayed.3. When reset, remove the battery Wait for a while and then turn on the power to eliminate the remaining power in the machine.4. Whether the red light of the transmitter flashes, the flashing is normal, and vice versa.5. The product is only suitable for measuring the height ≥ 1m of the tank level, the bottom of the liquid level device to the highest level of the tank must be left between the safety distance of 0.5m, after the receiver is turned on the first need to set the correct height of the tank and the safety distance according to the instructions, the incorrect settings will lead to measurement errors, if the value is set correctly does not show the level can be long pressed the tank key for 5 seconds to reconnect the level device and the receiver.