[![wireless_vacuum_probe_manifold](/sites/default/files/styles/product_image/public/images/IMA_28144_Si-RV4_A2L-A3_Front_1.png?itok=9UFvOS68)](https://www.kimo-instruments.com/sites/default/files/styles/max_1300x1300/public/images/IMA_28144_Si-RV4_A2L-A3_Front_1.png?itok=ORDvgQeG) [![wireless_vacuum_probe_manifold](/sites/default/files/styles/thumbnail/public/images/IMA_28143_Si-RV4_Right_web_1.png?itok=I6rhLDNa)](https://www.kimo-instruments.com/sites/default/files/styles/max_1300x1300/public/images/IMA_28143_Si-RV4_Right_web_1.png?itok=K2tl0g2y) [![wireless_vacuum_probe_manifold](/sites/default/files/styles/thumbnail/public/images/IMA_28143_Si-RV4_Front_web_2.png?itok=IFscnrdZ)](https://www.kimo-instruments.com/sites/default/files/styles/max_1300x1300/public/images/IMA_28143_Si-RV4_Front_web_2.png?itok=6-RxLiGC) [![wireless_vacuum_probe_manifold](/sites/default/files/styles/thumbnail/public/images/IMA_28143_Si-RV4_Profile_web.png?itok=3dVTcXr0)](https://www.kimo-instruments.com/sites/default/files/styles/max_1300x1300/public/images/IMA_28143_Si-RV4_Profile_web.png?itok=zpvJpK3a) [![A2L A3 compatible](/sites/default/files/styles/thumbnail/public/images/WEB_A2L-A3_0_1.png?itok=sL2ZEa3y)](https://www.kimo-instruments.com/sites/default/files/styles/max_1300x1300/public/images/WEB_A2L-A3_0_1.png?itok=Rs9l87Vq) Ref: Si-RV4 This wireless vacuum probe accurately measures absolute pressure, to ensure optimal refrigerant system evacuation down to deep vacuum in air conditioning, refrigeration and heat pump installations. The Si-RV4 allows all types of refrigerant-based installations to be serviced quickly and safely. It connects easily to the [Si-RM350](https://sauermanngroup.com/en-INT/node/39571) and [Si-RM450](https://sauermanngroup.com/en-INT/node/39574) manifolds and to the [mobile application Sauermann Pilot](https://sauermanngroup.com/en-INT/node/39599). ##### A1 / A2L / A2 / A3 refrigerants compatible Compatible with some B1 refrigerants, see list of refrigerants for details on which refrigerants are compatible. The device must not be used with ammoniac refrigerant (NH3 / R717). [ Technical Data sheet ](https://www.kimo-instruments.com/sites/default/files/files/DS_APAC_Si-RV4_EN_14-01-25_0.pdf) [ Simplified manual ](https://www.kimo-instruments.com/sites/default/files/files/QSG_RP4-RV4-Si-RT2-Si-RT5-Si-RT7-Si-TH4_22-09-25_9.pdf) High accuracy Pirani® sensor, 50 microns deep vacuum A1, A2L, A2 and A3 refrigerants compatible Quick & Strong wireless auto connection (100 m/328 ft range) Real time readings on manifold and mobile app IP54 dust & rain proof probe Product info #### Measure details - Units inHg, inH₂O, mTorr, Torr, Pa, micron, mbar, hPa, mmHg ![shadow](/themes/custom/kimo/images/divider-big.png) #### Measuring ranges - Vacuum 50.00 micron ... 25000.00 micron ![shadow](/themes/custom/kimo/images/divider-big.png) #### Technical details - Parameters Vacuum - IP Protection IP 54 - Battery life 150 hours - Standards 2011/65/EU RoHS II 2012/19/EU WEEE 2014/53/EU RED - Wireless connection Yes - Power supply 3x LR03 AAA 1.5 V alkaline batteries - Connections 1x 1/4 FFL female - Refrigerant database A1, A2L, A2 and A3 refrigerants compatible ![shadow](/themes/custom/kimo/images/divider-big.png) #### Instrument Dimensions - Length Width Height Weight - 7 inches , 178 mm 1 1/2 inches , 37.7 mm 1 13/16 inches , 45 mm 7/16 pounds , 200 g ![shadow](/themes/custom/kimo/images/divider-big.png) #### Operating temperature - Min Max - -20.00 °C 50.00 °C - -4.00 °F 122.00 °F ![shadow](/themes/custom/kimo/images/divider-big.png) #### Storage temperature - Min Max - -20.00 °C 50.00 °C - -4.00 °F 122.00 °F ![shadow](/themes/custom/kimo/images/divider-big.png) Supplied with 1 Adjustment certificate 3 AAA batteries Downloads #### Documents [ Manifolds](/sites/default/files/files/DOC_EN-INT_Manifold-2025_V1-20250519_Web.pdf) Software [ ![Sauermann_pilot_mobile_app_ios_android](/sites/default/files/styles/small/public/images/IMA_MOBILE-APP_%20iPhone%2015_web_0.png.webp?itok=FScfWI2D) Sauermann Pilot](/en-APAC/measuring-instruments/digital-refrigeration-gauges/software/sauermann-pilot) Videos [![](/sites/default/files/styles/video_ct_thumbnail/public/video_thumbnails/vDphZcQeAAk.jpg.webp?itok=e4jBK1C1)](/en-INT/videos/si-rm350-si-rm450-manifolds-range) ## [Si-RM350 & Si-RM450 Manifolds Range](/en-APAC/videos/si-rm350-si-rm450-manifolds-range) Compliance