In refrigeration, air conditioning, and heat pump systems, proper evacuation is critical to ensure efficiency, reliability, and long-term performance. Any residual moisture or non-condensable gases left inside the circuit can compromise system operation and lead to costly failures. That’s why professionals need accurate tools they can trust. The Si-RV4 wireless vacuum probe by Sauermann is designed to provide precise deep vacuum measurements while simplifying the evacuation process in the field.
A smart solution for HVACR professionals
The Si-RV4 accurately measures absolute pressure to verify the complete evacuation of refrigerant circuits down to deep vacuum levels. It is suitable for servicing:
- Air conditioning systems
- Refrigeration installations
- Heat pumps
- All types of refrigerant-based systems
With a measuring range from 50 to 25,000 microns, the Si-RV4 allows technicians to monitor vacuum levels precisely and confidently throughout the evacuation process.
High-accuracy measurement with Pirani® sensor
At the heart of the Si-RV4 is a high-accuracy Pirani® sensor, capable of measuring vacuum down to 50 microns. This level of precision helps professionals confirm that the system has reached the proper vacuum level before charging refrigerant.
Accurate vacuum measurement reduces the risk of contamination, improves system efficiency, and protects critical components.
Wireless convenience in the field
The Si-RV4 features quick and strong wireless auto connection with a range of up to 100 meters (328 ft). It connects easily to the Si-RM350 and Si-RM450 manifolds, as well as the Sauermann Pilot mobile app, allowing technicians to monitor measurements in real time without staying next to the system.
This wireless functionality offers several advantages:
- Greater flexibility during evacuation
- Safer working conditions
- Faster diagnostics and reporting
- More efficient workflow on-site
Built for demanding environments
Designed for professional use, the Si-RV4 features an IP54-rated housing, making it resistant to dust and rain. It also offers up to 150 hours of battery life, minimizing downtime during long service sessions.
Compatible with A1, A2L, A2, and A3 refrigerants, the Si-RV4 is a versatile tool for modern HVACR systems. (It should not be used with ammonia refrigerant NH₃ / R717.)
A reliable partner for deep vacuum verification
As HVACR systems become more advanced and energy efficiency standards continue to rise, professionals need tools that combine accuracy, portability, and smart connectivity. The Si-RV4 wireless vacuum probe delivers all three, making deep vacuum measurement easier and more reliable than ever.
For HVACR technicians who want faster evacuation, more accurate verification, and a smarter workflow, the Si-RV4 is the ideal solution.
