Blue Sea 1741 Mini OLED Temperature Meter

The Blue Sea Systems 1741 Mini OLED Temperature Meter reads -40°F to 250°F at one-degree resolution, mounting in a 1-1/8-inch instrument hole.

Temperature is the measurement most boats never monitor, and it is often the earliest warning of a developing problem. A battery compartment warming, a refrigeration space drifting up, or a machinery area running hotter than usual all show here before anything fails outright.

One-degree resolution is what makes that useful. A gradual rise over days is visible where a coarser display would show the same number throughout. Readings display in Fahrenheit or Celsius, covering -40°F to 250°F.

The 1-1/8-inch mounting hole is the standard gauge cutout, so the meter fits a crowded helm without new holes being made. Reverse-polarity protection guards against a wiring mistake, the waterproof display stays readable in daylight, and low operating current suits continuous monitoring. Explore more marine electrical meters.

• Temperature is the warning most boats never watch
• Catches a compartment warming before anything fails
• One-degree resolution shows a gradual rise
• Fits the standard 1-1/8-inch gauge cutout