Fluke 750P Differential Pressure Modules have two pressure fittings and measure the difference between the applied pressure on the high fitting versus the low fitting. Each module is clearly labeled for range, overpressure and media compatibility. All modules include NPT, metric (BSP) and M20 adapters. The 750P Series are highly accurate, with specifications that apply from 0 to 50°C (32 to 122°F), a feature that sets them apart from other pressure calibrators.