Feature: 1. 12‑24V Power Supply System: Accommodates a wide range of power inputs, offering versatile usability across different scenarios and ensuring strong compatibility. 2. Waterproof and Anti Fog: With waterproof and anti fog performance, delivering exceptional stability and durability even in high humidity and moist environments. 3. Multiple Alarm: Equipped with alarms for low water level, high sewage level, and low voltage, providing timely reminders and ensuring the safety of the equipment. 4. Colorful Backlight: Features a vibrant backlight design that enhances visibility during nighttime or in dimly lit environments, significantly improving the user experience. 5. Premium Material: Constructed from robust 316 stainless steel and ABS materials, strong corrosion resistance, suitable for sewage, fresh water environments. Specification: Item Type: Marine Water Level GaugeMaterial: 316 stainless steel + ABS .Opening Hole Size: Approx. 250x145mm/9.84x5.71in Working Voltage: 12-24VDC Operating Current: ≤70mA (24V) Working Temperature: -30~+75°C Storage Temperature: -40~+85*C Water Level Sewage Meter Signal: 0~190 Ω (factory default) 0~180 Ω 10~180 Ω 240-33Ω 240-30Ω Connection: 1. Red Line: 9-32VDC 2. Panel Black Line: Negative pole of power supply 3. Meter Black Line: Sensor Function: 1. Press the Mode button (less than 1 second) to change the backlight color: Order: Red (default) → green→ blue→ white→ yellow→ yellow-green→ orange→purple. 2. The alarm light is set by default water level meter alarm position≤ 1/8; Sewage meter alarm position≥ 7/8. Switch Function: 8 switches control 8 different devices, 8 overload protectors protect 8 switches and 8 devices respectively. Features: 12-24V system, waterproof and anti fog, colorful backlight, low water levelalarm, high sewage alarm, low voltage alarm Package List: 1 x Marine Water Level Gauge1 x Pack of Accessory (5 Pcs)1 x Manual