Need a new replacement oxygen sensor for your gas emission smog analyzer? USA MADE TELEDYNE This sensor will fit diagnostic smog equipment - Typical number on the sensor is an R-22A with metric threads. This sensor will work on models: Bear - SPX - OTC - - Sun - MPSI - Horiba - Sensors - Infrared - Vetronix - Interro - EMS - KAL - Tif - ESP - Hamilton - Ferret 14 - Ferret 16 -Worldwide gas emission inspection analyzers. Also this Oxygen Sensor compatible with: Analytical Industries: PSR-11-917-J Ceramatec: CAG-12 City Technologies: MOX-9, R-24 Envitec: OOM202 Datex-Ohmeda: 6051-0000-222 Hamilton Medical: 396008, 396009, HM-12 Hudson RCI: 5566, V-12 Integral Process: 65016 IMT Medical: PF300 Maxtec: MAX-12 R109P45 Mercury Medical: 10-103-06 MSA: 472062,470644 Nuova: E-17/M Pacifitech: PT-12A Puritan Bennett: 4-072214-00 Siemens: 9004979-E347E, 6419332-E380E Sensidyne: SV-12A SensorTech: ST-01 Spacelabs: 90513 Taema: YR049700 Teledyne: R24 MED, B-62321 Ventrex: V-12A Viamed: R-24Med VTI Vascular Technology: 103100 Oxygen Sensor Class R-22A Oxygen Sensor Class R-22A Model: 460072 Smog Emission Analyzer Oxygen Sensor O2 4 Gas or 5 GasTELEDYNE