Notes: 1. Please connect the power supply exactly as the connection instruction. 2. The product is a precision device, so it is not allowed to disassemble and crash the device or make it fall from the high place, whatβs more, donβt touch its diaphragm with any sharp objects in case of causing device damage. 3. Power the transmitter up then you can use it. But it can provide more steady output after preheating for 30 minutes. Please turn off the power and stop using if any abnormality is found during use. 4. The liquid level lead should be vertically downward. Please prevent water from entering the terminal, and the joint is required to be waterproof. 5. Place the liquid level probe in water, try to fix it and keep it away from the inlet.