Update: new instruments!
In 2022, two new leak detectors were added to the HVAC-R measuring range: the Si-RD3 for refrigerant gases and the Si-RD3 for fuel gases. 
In addition, the brand-new Si-VH3 hotwire thermo-anemometer has been available since the beginning of 2023 in the same range. It allows air flow measurements with very high sensitivity and accuracy.

Air parameters measurement

Instrument	Heating	Ventilation	Climatisation	Refrigeration
New Si-VH3 Hotwire thermo-anemometer		Air-conditioning circuit
		- Measure air flow in ducts
	Tip: Input the duct cross-section in the app to calculate average air flow rate in addition to air velocity. Use Hotwire instead of a vane for low speed air flows, or laminar air flows.
Si-RM3 Manifold	Heat pumps	Air-conditioning units		Refrigerators, freezers
	-  Measure superheat and sub-cooling of the refrigerant gas circuit  -  Measure high side and low side pressure  -  Calculate condensation and evaporation temperatures for 126 different gases
	Tip: Essential when repairing a refrigerant gas leak (checking for draining and clogging, and re-commissioning).
Si-PM3 Digital differential pressure manometer	Gas-fired boilers	Ventilation circuit
	-  Measure pressure at the gas inlet valve  -  Measure pressure drop (draft) at the flue	- Check filter clogging  - Measure extractor fan pressure and air flow rate - Measure air flow in a duct
	Tip: Use the smartphone app to automatically calculate air flow and air velocity in a duct. Connect the manometer at the pressure element and enter the coefficient. You can also connect a Pitot tube and enter the coefficient and duct dimensions.
Si-TT3 Dual input thermocouple thermometer	Water heaters	Multifunction		Refrigerators, freezers
	-  Compare the water temperature in the boiler outlet and return pipes.	-  Ambient air temperature  -  Air temperature in the ducts  -  Temperature in domestic hot water systems		- Measure superheat and sub-cooling of the refrigerant gas circuit.
	Tip: The smartphone app records the temperatures, and delta temperatures, over time to see that installation is working correctly. Can be viewed as a table or a graph.
Si-TI3 Infrared thermometer	Radiators
	- Measure radiator hot and cold spots to determine if venting is required.
	Tip: Vastly improves speed and convenience (measurements delivered remotely in real time). Can measure ambient temperature (via app). Quickly see if you have overheating sources, for example on an electric installation.  Affix a black strip on non-black surfaces. Adjust the emissivity of the surface (as per the manual) from 0.10 to 1.00 for accurate measurement.
Si-HH3 Thermo-hygrometer		Ventilation
		- Measure ambient air temperature and relative humidity.
	Tip: Extreme relative humidity values (too high or too low) can pose hazards (allergies, germs, dust, mould, etc.). The app shows psychrometric parameters, such as dew point and wet temperature.
Si-VV3 Vane thermo-anemometer		Air-conditioning circuit
		Measure air flow through system inlet and outlet air vents.
	Tip: Input the duct cross-section in the app to calculate average air flow rate in addition to air velocity.

Leak detection (not compatible with the Si-HVACR application)

	Heating	Ventilation	Climatisation	Refrigeration
Si-CD3 Gas leak detector	Gas-fired boilers
	Detects leaks of combustible gases upstream of the boiler, at the inlet and inside the unit.
	Tip: A flexible probe keeps the device’s sensor in contact with gas pipes in even the hardest-to-reach places.   Pay special attention to joints in the circuit.  Follow the manufacturer’s recommendations for replacing the sensor.
Si-RD3 Refrigerant leak detector	Heat pumps	Air-conditioning units		Refrigerators, freezers
	Detects refrigerant leaks in every part of the cooling circuit.
	Tip: A flexible probe keeps the device’s sensor in contact with gas pipes in even the hardest-to-reach places.   Pay special attention to joints in the circuit.  Check the condition of the filter and replace it if necessary.  Follow the manufacturer’s recommendations for replacing the sensor.

Greater efficiency

HVACR measurement instruments are often unwieldy and difficult to handle. That’s why Sauermann has introduced a new range of devices, designed specifically to make installation and maintenance tasks easier for HVAC engineers.

Our R&D team started with a simple premise: to overcome the reliability issues that beset entry-level instruments, and to outperform mid-range devices on ease of use and features, including an integrated backlit screen in addition to wireless pairing with Android and iOS tablets and smartphones. And most of all, they drew on Sauermann’s 40 years of experience in metrology to develop measurement instruments that meet the exacting reliability requirements of HVACR professionals.

What’s more, our experts have condensed the controls down to just two buttons, setting a new standard for ease of use. And last but not least they all have great battery life: the Si-TT3 can operate for up to 400 hours!