This pressure sensor is perfect for measuring fuel, oil, or boost pressures up to 150 PSI and is compatible with many aftermarket engine management systems, including MegaSquirt and MS3Pro. The sensor delivers a reliable, linear 0-5V output for seamless integration with your ECU. Features: Measures pressures from 0 to 150 PSI 1/8” NPT screw-in design for easy installation 0-5V output for compatibility with a wide range of aftermarket ECUs High-accuracy sensor with ±1% full scale Durable, robust construction designed for harsh environments Specifications: Pressure Range: 0-100 PSI Output: 0-5V linear signal Thread Size: 1/8” NPT Accuracy: ±1% full scale Working Temperature Range: -40°F to 257°F (-40°C to 125°C) Input/Output Values: 0.5V = 0 PSI 4.5V = 150 PSI **Firmware 1.6: Select the “Linear .5v-4.5v” Option for an output range of 0.5V to 4.5V, corresponding to a pressure range values of 0 to 150 PSI. **Firmware 1.5 or Older: Select the “Linear” Option for an output range of 0.0v to 5.0V, corresponding to a pressure range values -18.75 PSI to 168.75 PSI. Wiring: Red: 5V Vref Black: Sensor Ground Yellow: Signal Output to ECU Included in Box: 0-150 PSI Pressure Sensor (Optional) 15ft Cable with 90° Boot