4pc Sensor, Programmable Tyre Pressure Sensor 2-in-1 Dual Frequency TS100 July 26, 2024 | admin Langren Sensors Four Four Four Four, Programmable Tyre Pressure Sensor 2-in-1 Dual Frequency TS100. You need to have a Langren Matching Instrument to use it, don’t order without the Matching Instrument.