Trail Tech 742-EH3 TTO Digital Water Temperature Gauge 25mm Hose Sensor Black

The Trail Tech 742-EH3 TTO Digital Water Temperature Gauge is a compact, self-powered surface-mount meter designed for water-cooled powersport engines. Featuring a 25mm (I.D.) radiator hose sensor, this gauge installs directly inline with the coolant hose — no wiring to a power source required, thanks to its built-in internal battery.

Key Features:

• TTO Digital Display — Backlit LCD with large, easy-to-read digits for at-a-glance monitoring in all lighting conditions
• Ultra-Compact Design — The smallest available meter in its class at just 50 x 25 x 14mm, fitting virtually anywhere on your machine
• 25mm Hose Sensor — Inline radiator hose connector designed for standard 25mm I.D. coolant hoses on water-cooled engines
• Current & Max Temperature — Displays both real-time coolant temperature and records peak temperature reached
• Self-Powered — Internal non-replaceable battery rated for 5+ years of use; no electrical connection to vehicle required
• Dual Mounting Options — Bolt-on or peel-and-stick adhesive mounting (screws not included)
• Displays in °F and °C — Switchable between Fahrenheit and Celsius readouts
• Black Finish — Durable black housing for a clean, low-profile look

The Trail Tech TTO series is engineered by powersport enthusiasts for both on-road and off-road applications. The 742-EH3 is ideal for monitoring coolant temperature on dirt bikes, ATVs, UTVs, snowmobiles, and other water-cooled powersport vehicles. The simple hose-splice installation means no special tools or electrical expertise are needed — cut the hose, install the sensor fittings, and plug in the gauge.