2-1/16in O/T/B Water Temp. Gauge 100-250

The 2-1/16in O/T/B Water Temp. Gauge 100-250 from AUTOMETER is an essential instrument cluster upgrade for serious engine builders, weekend warriors, and professional mechanics who demand accurate real-time coolant temperature monitoring. Whether you're tuning a modified street engine, monitoring cooling system performance during track days, or diagnosing thermal issues on a classic build, this gauges provides the precision feedback needed to optimize engine tune and prevent catastrophic overheating. The 2-1/16-inch form factor fits seamlessly into custom dash pods, pillar mounts, or A-pillar gauge clusters on virtually any vehicle platform, from domestic muscle cars to import tuners.

This water temperature gauge operates across a 100–250°F range, covering normal street cruising temperatures through high-heat performance and racing scenarios. The over-the-top (O/T/B) configuration means the gauge reads maximum temperature at the top of the dial—the industry-standard layout that allows at-a-glance recognition of thermal status without taking your eyes off the road. AUTOMETER's precision movement and calibrated sender ensure accuracy within ±3%, critical when tuning fuel delivery, ignition timing, or cooling fan thresholds. The compact 4.6 x 4.5 x 4.8-inch envelope and lightweight 0.6-pound design make installation straightforward in tight engine bays or confined dashboard spaces without sacrificing readability or durability.

Performance enthusiasts, engine builders, and technicians rely on this gauge for real-time diagnostics on modified engines where factory thermal management is inadequate or where water routing bypasses original sensors. Installation requires a compatible sender unit and simple wiring; most setups take under 30 minutes. This gauge works with any 12-volt vehicle electrical system and pairs seamlessly with other AUTOMETER instruments in multi-gauge builds. Whether you're troubleshooting a cooling system upgrade, monitoring a fresh engine rebuild, or verifying thermostat operation on a tuned platform, the 2-1/16in AUTOMETER water temperature gauge delivers the accuracy and reliability that professional-grade engine management demands.