Posted on March 4, 2022 3208 INDUSTRIAL ENGINE – Gauge For Water Temperature 5L7446 Gauge; Use with 2N1311 Sending Unit. Rating … 12V Temperature range … 100 to 240°F(38 to 115°C) Calibration test at 14V (30° mounting): 100°F (38°C) … 348.7 Ohms 170°F (77°C) … 84 Ohms 240°F (115°C) … 30.2 Ohms