Sauermann Si-RM450 4-Way Digital Refrigeration Manifold

The Sauermann Si-RM450 4-Way Digital Refrigeration Manifold is designed for commissioning and servicing refrigeration-based installations. From domestic air conditioning and heat pumps to advanced industrial refrigeration systems, the Si-RM450 delivers fast and accurate diagnostics. It features the latest digital technologies, such as a built-in smart assistant that helps technicians complete tasks quickly.

With expanded 4-way functionality, the Si-RM450 supports over 130 refrigerants with automatic updates and comes with a high-contrast, anti-glare graphic display that remains readable in sunlight or low-light conditions. It offers up to 300 hours of battery life, with alternative USB-C power for uninterrupted operation.

The Si-RM450 boasts a large internal memory that records up to 600,000 points or nine days of data, along with 8 integrated measurement programmes such as automatic superheat and subcooling and COP and EER efficiency calculations. An intuitive “Easy Mode” allows easy single-port connections, while the parrot-shaped clamp design ensures secure contact on pipes from 6 to 42 mm. With an IP54 protection, the Si-RM450 is protected from dust and rain, making it suitable for demanding on-site conditions.

Probe Compatibility

The Si-RM450 works seamlessly with both wired and wireless probes at a distance range of up to 100 m/328 ft. For example, pressure can be measured via flexible hoses or the Si-RP4 probe, while temperature can be recorded using the Si-RT2 wired clamp, the Si-RT7 wireless clamp or the Si-RT5 self-gripping probe. Vacuum measurement is made possible via the Si-RV4 wireless vacuum probe, and for temperature and humidity monitoring, it integrates with the Si-TH4 wireless thermo-hygrometer.

Integration with the Sauermann Pilot app

The free Sauermann Pilot app, available on iOS and Android, pairs seamlessly with the Si-RM450 to provide technicians with complete control and reporting tools right from their mobile device. The capabilities include:

• Real-time control and readings display
• Secure recording of measurements
• Create, sign and send reports with photos
• Export reports in PDF or CSV (Excel) format
• Manage a detailed customer database directly in the app

The Si-RM450 is housed in reinforced polyamide with 30% glass fibre, combining lightweight handling with durability. A high-strength aluminium hook allows secure suspension, while a simple 4-key interface (Up / Down / OK / Esc) simplifies control. Additional details such as a rear hook, anti-theft padlock slot, and USB-C power option enhance usability on the job.

Part number: 28139

Key Features

• 130+ refrigerants supported
• Auto updates to industry evolutions
• Perfect readability in daylight sun
• Backlit for indoor use
• Industry leading anti-glare design
• Internal memory data-logging up to 3 days with 300 h battery life
• Anti-theft padlock slot, rear hook and USB-C wired power supply
• Wired and wireless probes (100 m/328 ft range)
• IP54 dust & rain proof body
• “Parrot” clamp shape optimized for 6 to 42 mm (0.2’’ to 1.7’’) pipes
• 8 integrated measurement programs
• New “Easy Mode” with single pressure port connected
• Efficiency calculations: COP and EER ratings