JJCOCO Water Temperature Gauge 2" (52mm) with 1/8NPT Sensor — LED Display & Configurable Overheat Alarm

JJCOCO's 2" digital water temperature gauge with a 1/8NPT sensor provides real-time coolant readings and a configurable overheat alarm for automotive, marine, and heavy-duty use. This compact gauge pairs a bright LED display with a sealed 1/8" NPT temperature probe and mounting bracket so you can monitor coolant, transmission, or hydraulic fluid temperatures at a glance. Built for practical installs, the unit uses a pre-sealed connector for straightforward wiring, offers dual-alert and peak recall, and includes over-voltage protection and rugged construction for demanding environments.

How accurate and wide-ranging are the temperature readings?

The JJCOCO gauge reads from 32°F to 300°F (0°C to 150°C), giving you the span needed for everyday driving, towing, and marine operations. The display updates in real time and includes peak recall so you can review the highest temperature reached during a trip.

• Range: 32°F–300°F (0°C–150°C)
• Peak recall stores the maximum temperature reached
• Bright LED display for quick visibility day or night

How do I set the alarm and avoid overheating surprises?

The temperature alarm is user-configurable with a simple long-press and incremental buttons. Set a flashing overheat threshold to get an obvious visual alert; values auto-save after a few seconds so you won’t need to reconfigure each drive.

• Long-press WARN to enter alarm set mode
• Use WARN (+) and PEAK (-) to adjust the threshold
• Alarm flashes and records events; settings auto-save after 3 seconds

Is installation complicated and will this work with my vehicle?

Installation is designed to be plug-and-play: the sensor connects with a pre-sealed OEM-style connector so modification isn’t necessary. The kit includes a mounting bracket, wiring guide, and stickers; it runs on 12V DC and adds built-in over-voltage protection for safe use across cars, trucks, boats, and RVs.

• Pre-sealed connector—no cutting or splicing required
• Supplied bracket and wiring diagram for quick setup
• 12V DC compatible with over-voltage protection and 0.3A draw

How robust is the gauge for off-road, marine, or heavy-duty use?

The gauge is built with shock and vibration resistance to stand up to rough roads and engine bays, while the 1/8" NPT sensor is corrosion-resistant for coolant and oil environments. A waterproof enclosure helps maintain reliability in wet or salty conditions.

• Military-grade shock and vibration tolerance
• Corrosion-resistant 1/8" NPT sensor for fluids
• Waterproof housing suitable for marine and off-road use

Who is this for? This JJCOCO gauge is for drivers, mechanics, and boat owners who want precise temperature feedback and an early warning system without complex installs. It suits daily drivers monitoring engine coolant, performance enthusiasts tracking peak temps, tow vehicles and RVs running heavy loads, and marine operators who need rugged, waterproof monitoring. If you want a clear LED readout, fast setup with a sealed sensor, and reliable alerts to protect your engine or drivetrain, this unit provides practical, heavy-duty monitoring in a compact 2" package.

FAQ

Q: What temperature range does this gauge measure?

A: It measures from 32°F to 300°F (0°C to 150°C) with peak recall for maximum readings.

Q: Do I need to cut wires to install the sensor?

A: No—sensor uses a pre-sealed OEM-style connector for plug-and-play installation without cutting.