When the thermistor is removed from the fuel and in air, things start to change very slowly, that small current heats the thermistor itself very slightly, the increase in temperature causes the thermistor to reduce its resistance.
Engine Oil Pressure Test Tester Kit Low Oil Warning Devices Car Van LCV Tool UK
Engine Oil Pressure Test Tester Set Kit Low Oil Warning Devices Car Van LCV Tool
12Pcs Engine Oil Pressure Test Tester Kit Low Oil Warning Devices 0-140 PSI UK
Engine Oil Pressure Test Tester Kit Set Low Oil Warning Devices Car Van LCV Tool