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Description
The Mastercool MRBL1 is a Class 1.0, 80 mm low-side replacement gauge with multi-refrigerant scales for R22/R404A/R407F/R134a. Built with anti-flutter to steady the pointer, it gives clean, repeatable readings so you can charge and diagnose without the guesswork — fair dinkum handy when time’s tight.
Key features & trade benefits
- Class 1.0 accuracy, 80 mm face — fast, confident LP readings at a glance, even in glare.
- Anti-flutter movement — steadier needle = better charge control and fewer call-backs.
- R22/R404A/R407F/R134a temperature rings (°C) — quick PT checks right on the dial.
- Dual BAR/PSI/kPa scales — log readings in your preferred units across jobs.
- Spare-part gauge only — rapid swap on site to get your manifold back to work.
Why this product matters
Real-world: you’re on a Sydney roof in a nor’easter, customer watching, and your old LP dial’s dancing all over. Drop in the MRBL1 and the pointer settles — no worries about overcharging or misreads. If you’re rebuilding the whole rig, check our Mastercool manifold gauge sets.
Pro tip
Let the gauge equalise to ambient, zero-check, then install carefully. Confirm your manifold’s gauge thread and avoid over-torque — snug is enough to keep the anti-flutter working a treat.
Compatibility & system info
- Refrigerants: R22, R404A, R407F, R134a (LP scales printed on dial).
- Scales: BAR / PSI / kPa with °C saturation rings.
- Fitment: Replacement LP gauge for compatible analogue manifolds (verify thread on your set).
Local note: From humid Brisbane plant rooms to windy Sydney rooftops, the big 80 mm face stays readable — ripper visibility.
What’s included
- 1 × Mastercool MRBL1 80 mm low-side gauge (spare part, face marked for R22/R404A/R407F/R134a).
Specifications
| Model | MRBL1 (Low side) |
| Dial size | 80 mm (≈3-1/8″) |
| Accuracy class | Class 1.0 |
| Refrigerants | R22, R404A, R407F, R134a |
| Units | BAR / PSI / kPa with °C PT scales |
| Movement | Anti-flutter stabilised pointer |
| Supplied as | Gauge only (spare part) |
Specs confirmed from the HVAC Shop listing.
Warranty & returns
Backed by HVAC Shop’s standard warranty & returns when installed by licensed technicians. Follow Australian refrigerant-handling and WHS requirements on site.
FAQs
Is it really Class 1?
Yes — MRBL1 is Class 1.0 with BAR/PSI/kPa and °C PT rings for the listed refrigerants.
Will it fit my manifold?
It’s a replacement LP dial for compatible analogue bodies; check your thread and mounting style before ordering.
Is there a matching high-side dial?
Yes — pair with the MRBH1 high-side gauge for consistent faces.
Related products
- 80 mm Gauge Protector Set (91553-EE) — helps prevent lens damage and fogging when the kit slides around the van.
- Mastercool Manifold Gauge Sets — a tidy option if you’re refreshing more than one dial, she’ll be right.
- Matching High-Side Gauge (MRBH1) — keep both sides aligned for clean, readable sets.
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