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Sauermann Si-RM450 4-way Digital Refrigeration Manifold

Sauermann
SKU: SAUESIRM450

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Key Features
  • User-friendly troubleshooting with diagnostics
  • Large internal memory that records up to 600,000 points or nine days of data
  • Works seamlessly with both wired and wireless probes

Related Categories

Digital Refrigerant Manifolds & Kits Heat Pump Testing / Commissioning
Description

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

What's In The Box?

  • 1 Adjusting certificate
  • Supplied in hard plastic case
Specification
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Specification
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General specifications

  • Power supply: 4 × LR6 or AA 1.5 V batteries. Alternative power supply: USB-C
  • Battery life: 300 hours**
  • Memory: Up to 600 000 points and 9 days of recording
  • Display: Graphic screen; 240 x 128 px
  • Languages English, French, Spanish, Italian, German, Chinese, Portuguese, Romanian, Hungarian, Polish, Dutch
  • Pressure connectors: Si-RM450: 3x 1/4 MFL male + 1x 3/8 MFL male
  • Temperature connectors:  2x wired jack (NTC)
  • Wireless frequency: Range frequency from 2402 MHz to 2480 MHz with a transmission power of 8 dBm.
  • Wireless range: Range between manifold and wireless probes up to 100 m (328 ft).
  • App connection: depends on smartphone radio strength, range up to 100 m (328 ft).
  • Compatibility: Smartphone minimum required versions: Android 11.0, iOS 15, BLE 5.0***
  • Port: USB-C
  • Superheat and subcooling: Automatically calculated by the device
  • Environmental conditions of use: In non-condensing condition | Altitude: from 0 to 2000 m (0 to 6561 ft) | Non-corrosive gases
  • Operating temperature: From -20 to 50°C (-4 to 122°F)
  • Storage temperature: -20 to 50°C (-4 to 122°F)
  • European directives: 2014/53/EU (RED) - 2015/863 EU (RoHS 3) - 2012/19/EU WEEE

Housing specifications

  • Control: 4 keys (Up / Down / OK / Esc)
  • Hook: High strength aluminium
  • Material: Plastic parts in polyamide reinforced with 30% of glass fiber
  • (PA 6.6 + 30 GF)
  • Protection: IP54, suitable for A2L and A3 refrigerants
  • Weight: 1.330 Kg (2.93 lb)
Reviews
Trustpilot

Accessories

  1. Sauermann Si-TH4 Wireless Thermo-hygrometer (Psychrometer)
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  2. Sauermann Si-RT5 Large Diameter Pipe Temperature Probe
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  3. Sauermann Si-RT7 Wireless Temperature Clamp front view
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    £100.80 (inc VAT)
    Typically ships in 3-5 working days
  4. Sauermann Si-RT2 Wired Temperature Clamp
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    £39.70 (ex VAT)
    £47.64 (inc VAT)
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  5. Sauermann Si-RP4 Wireless Pressure Probe
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    £112.80 (inc VAT)
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  6. Sauermann Si-RV4 Wireless Vacuum Probe
    Sauermann Si-RV4 Wireless Vacuum Probe
    SKU: SAUESIRV4
    £137.00 (ex VAT)
    £164.40 (inc VAT)
    Typically ships in 3-5 working days
  7. Sauermann Si-RS1 Digital Refrigerant Scale
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£442.80 (Inc. VAT) £369.00 (Ex. VAT)