## [Checking heat pump pressure and temperature](/en-AU/solutions/checking-heatpump-pressure-temperature) ![Heat pump manifold solutions](/sites/default/files/entityone_paragraphs/images/SOLUTION-21_Intro_468x468.png) ## Measures interpreted for a proper diagnostic Heat pumps require precise balancing of pressures and temperatures to function correctly. A manifold is used to measure these parameters, prevent anomalies, anticipate breakdowns and optimise system performance. The latest generation of Sauermann manifolds has precise and ergonomic sensors for measuring pressure and temperature, facilitating a complete and efficient diagnosis of the circuit. Technicians can thus quickly identify anomalies, such as leaks or a drop in the efficiency of the heat pump. ## Parameters to be monitored - **Pressure** - **Temperature** Manifold: the core tool ## Manifold: the core tool Pressure and temperature measurements provide important information on the condition of the refrigeration circuit. They make it possible to check the functioning of the components and detect anomalies such as dirt or a refrigerant leak. The Sauermann Si-RM350 and Si-RM450 manifolds are compatible with all fluids (A1, A2L and A3) and have responsive and very accurate wired and wireless sensors. Their ease of use and eight integrated measurement programmes enable a reliable and rapid diagnosis to be made. [All our manifolds](/en-AU/digital-refrigerant-gauges) [ read more about Si-RM450 4-way manifold ](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm450-4-way-manifold) [![Si-RM450_manifold_4_way](/sites/default/files/styles/medium/public/images/IMA_28139_Si-RM450_A2L-A3_Front.png?itok=hxzfycBQ)](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm450-4-way-manifold) #### Si-RM450 4-way manifold Refrigerant handling, maintenance and commissioning Si-RM450 digital manifold gauge can be used to commission and service all types of refrigerant-based installations: heat pumps, air conditioning, refrigeration and reversible systems, from domestic systems to complex industrial machines. Very easy to operate, this digital manifold features the latest technologies for fast, comprehensive system diagnostics. Its smart digital assistant guides the operator in every situation to help him achieve his objectives in the best possible way. ##### A1 / A2L / A2 / A3 refrigerants compatible Compatible with some B1 refrigerants, see list of refrigerants for details on which refrigerants are compatible. This HVAC digital manifold must not be used with ammoniac refrigerant (NH3 / R717). [ read more about Si-RM350 2-way manifold ](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm350-2-way-manifold) [![Si-RM350_manifold_2_way](/sites/default/files/styles/medium/public/images/IMA_28138_Si-RM350_A2L-A3_Front.png?itok=6kX6Eujs)](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm350-2-way-manifold) #### Si-RM350 2-way manifold Refrigerant handling, maintenance and commissioning Si-RM350 digital manifold gauge can be used to commission and service all types of refrigerant-based installations: heat pumps, air conditioning, refrigeration and reversible systems, from domestic systems to complex industrial machines. Very easy to operate, this digital manifold features the latest technologies for fast, comprehensive system diagnostics. Its smart digital assistant guides the operator in every situation to help him achieve his objectives in the best possible way. ##### A1 / A2L / A2 / A3 refrigerants compatible Compatible with some B1 refrigerants, see list of refrigerants for details on which refrigerants are compatible. This HVAC digital manifold must not be used with ammoniac refrigerant (NH3 / R717). [ read more about Si-RM13 ](/en-INT/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm13) [![Si-RM13 combined manifold and smart wireless probes](/sites/default/files/styles/medium/public/images/Si-RM13-c_0.jpg?itok=jZGvL1Vx)](/en-INT/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm13) #### Si-RM13 Combined manifold with smart wireless probes and 2-channel by-pass This Si-RM13 combines the sturdiness of the analog manifold with digital smart wireless temperature and pressure probes. This premium package includes a traditional 2-channel analog manifold body (by-pass type) with flexible hoses and a durable block made of anodised aluminum. ![manifold sauermann](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION-21_Produits-01_699x393.png?itok=c9d4mwSO) Pressure measurements ## Pressure measurements In a heat pump, it is vital to maintain the correct levels of suction pressure (low pressure) and discharge pressure (high pressure). Any excess or lack of fluid, the clogging of components or the overloading of circuits can throw the whole system out of balance. Si-RP4 pressure sensors are curved to facilitate their connection to all types of installation: air conditioning, refrigeration systems, heat pumps and reversible systems. They provide precise measurements to enable effective interventions. [All our manifolds and probes](/en-AU/digital-refrigerant-gauges) [ read more about Si-RP4 Wireless pressure probe ](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rp4-wireless-pressure-probe) [![wireless_pressure_probe_manifold](/sites/default/files/styles/medium/public/images/IMA_28144_Si-RP4_A2L-A3_Front_1.png?itok=F5r_hwHJ)](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rp4-wireless-pressure-probe) #### Si-RP4 Wireless pressure probe For Si-RM350 and Si-RM450 manifolds This wireless pressure probe provides accurate high and low-pressure measurements for air conditioning, refrigeration and heat pump installations. The Si-RP4 allows all types of refrigerant-based installations to be serviced quickly and safely. It connects easily to the [mobile application Sauermann Pilot](https://sauermanngroup.com/en-AU/node/39599) via a low-power wireless communication protocol. ##### 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). [ read more about Si-RM450 4-way manifold ](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm450-4-way-manifold) [![Si-RM450_manifold_4_way](/sites/default/files/styles/medium/public/images/IMA_28139_Si-RM450_A2L-A3_Front.png?itok=hxzfycBQ)](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm450-4-way-manifold) #### Si-RM450 4-way manifold Refrigerant handling, maintenance and commissioning Si-RM450 digital manifold gauge can be used to commission and service all types of refrigerant-based installations: heat pumps, air conditioning, refrigeration and reversible systems, from domestic systems to complex industrial machines. Very easy to operate, this digital manifold features the latest technologies for fast, comprehensive system diagnostics. Its smart digital assistant guides the operator in every situation to help him achieve his objectives in the best possible way. ##### A1 / A2L / A2 / A3 refrigerants compatible Compatible with some B1 refrigerants, see list of refrigerants for details on which refrigerants are compatible. This HVAC digital manifold must not be used with ammoniac refrigerant (NH3 / R717). [ read more about Si-RM350 2-way manifold ](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm350-2-way-manifold) [![Si-RM350_manifold_2_way](/sites/default/files/styles/medium/public/images/IMA_28138_Si-RM350_A2L-A3_Front.png?itok=6kX6Eujs)](/en-AU/measuring-instruments/digital-refrigerant-gauges/wireless-digital-manifolds/si-rm350-2-way-manifold) #### Si-RM350 2-way manifold Refrigerant handling, maintenance and commissioning Si-RM350 digital manifold gauge can be used to commission and service all types of refrigerant-based installations: heat pumps, air conditioning, refrigeration and reversible systems, from domestic systems to complex industrial machines. Very easy to operate, this digital manifold features the latest technologies for fast, comprehensive system diagnostics. Its smart digital assistant guides the operator in every situation to help him achieve his objectives in the best possible way. ##### A1 / A2L / A2 / A3 refrigerants compatible Compatible with some B1 refrigerants, see list of refrigerants for details on which refrigerants are compatible. This HVAC digital manifold must not be used with ammoniac refrigerant (NH3 / R717). ![pressure probes manifolds](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION-21_Produits-02_699x393.png?itok=rR-F9KK3) Temperature measurements ## Temperature measurements Temperature measurements are added to pressure measurements to check for subcooling and superheating. Abnormal temperatures can be a sign of an inadequate amount of fluid, a defective regulator or system clogging. Sauermann temperature probes are equipped with an extremely sensitive NTC sensor. The Si-RT2 and Si-RT7 have a parrot beak design for optimal contact for a more reliable and faster measurement. The Velcro temperature probes can be adapted to larger diameter pipes. [All our probes and manifolds](/en-AU/digital-refrigerant-gauges) [ read more about Si-RT7 Wireless temperature clamp ](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rt7-wireless-temperature-clamp) [![wireless_temperature_clamp_manifold](/sites/default/files/styles/medium/public/images/IMA_28142_Si-RT7_Profile_web_1.png?itok=Wd7aGpqt)](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rt7-wireless-temperature-clamp) #### Si-RT7 Wireless temperature clamp This wireless probe provides accurate temperature measurement to enable the calculation of superheat and subcooling values in air conditioning, refrigeration and heat pump installations. Its parrot-shaped clamp ensures perfect contact with pipes from 6 to 42 mm (0.2’’ to 1.7’’). The Si-RT7 allows all types of refrigerant-based installations to be serviced quickly, thanks to the excellent responsiveness of its NTC sensor. It connects easily to the [Si-RM350](https://sauermanngroup.com/en-AU/node/39571) and [Si-RM450](https://sauermanngroup.com/en-AU/node/39574) manifolds, as well as to the [mobile application Sauermann Pilot](https://sauermanngroup.com/en-AU/node/39599). [ read more about Si-RT5 Wired temperature probe for large diameter pipe ](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rt5-wired-temperature-probe-large) [![wired_self_gripping_probe_manifold](/sites/default/files/styles/medium/public/images/IMA_28141_Si-RT5_Profile_web_1.png?itok=P9oKCXP7)](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rt5-wired-temperature-probe-large) #### Si-RT5 Wired temperature probe for large diameter pipe This wired probe provides accurate temperature measurement to enable the calculation of superheat and subcooling values in air conditioning, refrigeration and heat pump installations. Its hook-and-loop fastener makes it particularly suitable for large pipes up to 100 mm diameter. The Si-RT5 allows all types of refrigerant-based installations to be serviced quickly, thanks to the excellent responsiveness of its NTC sensor. It connects easily to the [Si-RM350](https://sauermanngroup.com/en-AU/node/39571) and [Si-RM450](https://sauermanngroup.com/en-AU/node/39574) manifolds. [ read more about Si-RT2 Wired temperature clamp ](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rt2-wired-temperature-clamp) [![wired_temperature_clamp_manifold](/sites/default/files/styles/medium/public/images/IMA_28140_Si-RT2_Right_web_1.png?itok=HkospORg)](/en-AU/measuring-instruments/digital-refrigeration-gauges/probes/si-rt2-wired-temperature-clamp) #### Si-RT2 Wired temperature clamp For Si-RM350 and Si-RM450 manifolds This wired probe provides accurate temperature measurement to enable the calculation of superheat and subcooling values in air conditioning, refrigeration and heat pump installations. Its parrot-shaped clamp ensures perfect contact with pipes from 6 to 42 mm (0.2’’ to 1.7’’). The Si-RT2 allows all types of refrigerant-based installations to be serviced quickly, thanks to the excellent responsiveness of its NTC sensor. It connects easily to the [Si-RM350](https://sauermanngroup.com/en-AU/node/39571) and [Si-RM450](https://sauermanngroup.com/en-AU/node/39574) manifolds. ![probe temperature manifolds](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION-21_Produits-03_699x393.png?itok=PYZF2WRV) Metrological requirements ## Metrological requirements The regulations for the verification of tools are very strict. Pressure gauges, thermometers, leak detectors, recovery stations and scales must be checked annually. Any incorrectly calibrated device can lead to errors in the interpretation of results. Sauermann technicians have state-of-the-art equipment to check and calibrate your devices. These services can be provided in our laboratories in Dordogne or Lyon, but also on site throughout the country, thanks to our team of travelling metrologists. [Ask for our services](https://sauermann-en.custhelp.com/) ![labs Lyon manifolds](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION-21_Produits-04_699x393.png?itok=o57Q6nV0) ## Products and accessories [ ![digital_refrigerant_scale_manifold](/sites/default/files/styles/event_thumb_max_200w/public/images/IMA_28153_Si-RS1_A2L-A3_FRONT_01.png.webp?itok=u_Q9K_xI) #### For Si-RM350 and Si-RM450 manifolds ### Si-RS1 Digital refrigerant scale The ultimate device for charging and recovering of refrigerant Sauermann electronic charging scale with wireless technology features an extra-large... Read more ](/en-AU/measuring-instruments/digital-refrigeration-gauges/accessories/si-rs1-digital-refrigerant-scale) [ ![two_2_stage_vacuum_pump_manifold_220V_spark_free](/sites/default/files/styles/event_thumb_max_200w/public/images/IMA_28156_Si-RVP3-220V_A2L-A3_RIGHT_01.png.webp?itok=4WrvIhDl) #### Spark free ### Si-RVP3-220V Two-stage vacuum pump Sauermann vacuum pumps are durable and time tested to stand up to the most grueling conditions and will provide years of reliable service. This vacuum... Read more ](/en-AU/measuring-instruments/digital-refrigeration-gauges/accessories/si-rvp3-220v-two-stage-vacuum-pump) [ ![two_2_stage_vacuum_pump_manifold_220V_solenoid_valve](/sites/default/files/styles/event_thumb_max_200w/public/images/IMA_28154_Si-RVP1-220V_RIGHT_01.png.webp?itok=dI-x4G_5) #### With solenoid valve ### Si-RVP1-220V Two-stage vacuum pump Sauermann vacuum pumps are durable and time tested to stand up to the most grueling conditions and will provide years of reliable service. This vacuum... Read more ](/en-AU/measuring-instruments/digital-refrigeration-gauges/accessories/si-rvp1-220v-two-stage-vacuum-pump) [ ![SI-RD3](/sites/default/files/styles/event_thumb_max_200w/public/images/Si-RD3-2.jpg.webp?itok=Zafr43Eq) #### Refrigerant leak detector ### Si-RD3 The Si-RD3 refrigerant leak detector uncovers leaks of most common refrigerant gases to a high degree of sensitivity, including all HCFC and HFC... Read more ](/en-AU/measuring-instruments/portable-instruments/refrigerant-leak-detector/si-rd3) Videos [![](/sites/default/files/styles/video_ct_thumbnail/public/video_thumbnails/tZYCSUP6pLU.jpg.webp?itok=MHv6RAZn)](/en-AU/videos/si-rm350-si-rm450-manifolds-range) ## [Si-RM350 & Si-RM450 Manifolds Range](/en-AU/videos/si-rm350-si-rm450-manifolds-range) Blog posts [ ![Manifold Sauermann](/sites/default/files/styles/insight_teaser/public/images/Manifol%20Blog%20Thumb_0.png?itok=Gu7n6Bz4) June 04, 2025 Heat pumps: how do they work and how to maintain them? Heat pumps are the new stars of the heating world. These systems outperform others on several fronts, and many governments are introducing new laws and regulations to encourage their use. Instruments ](/en-AU/insights/heat-pumps-how-do-they-work-and-how-maintain-them) [ ![mesure de bouche](/sites/default/files/styles/insight_teaser/public/images/mesuredebouche_0.jpeg?itok=eNF0UluM) November 26, 2021 Measuring air flow rate at an air vent: getting it right Here’s our comprehensive guide to taking accurate and reliable air flow rate and velocity readings at an air vent. Instruments ](/en-AU/insights/measuring-air-flow-rate-air-vent-getting-it-right) ![France](/sites/default/files/styles/thumbnail/public/images/Fichier%202%404236x.png?itok=2qUd9mwj) ## In-House Our two main factories Our customer service Our metrology laboratories Our Research & Development team ![45 ans d'expérience](/sites/default/files/styles/thumbnail/public/images/45%20ans%20Exp%20FR_0.png?itok=4p3BiSMc) ## 45 years of experience For over 45 years, the Sauermann Group has been designing, manufacturing and marketing products and services dedicated to the HVACR and industrial markets. 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