---
product_id: 144961588
title: "Refrigeration Technologies-RT100S Big Blu Micro Leak Detector 1 Qt"
brand: "refrigeration technologies"
price: "$62.41"
currency: USD
in_stock: true
reviews_count: 8
category: "Refrigeration Technologies"
url: https://www.desertcart.us/products/144961588-refrigeration-technologies-rt100s-big-blu-micro-leak-detector-1-qt
store_origin: US
region: United States of America
---

# Non-corrosive, clings to vertical surfaces Detects leaks as small as 0.65 oz/year NSF certified, food-safe formula Refrigeration Technologies-RT100S Big Blu Micro Leak Detector 1 Qt

**Brand:** refrigeration technologies
**Price:** $62.41
**Availability:** ✅ In Stock

## Summary

> 🔵 Spot leaks before they spot you — the pro’s choice for flawless detection!

## Quick Answers

- **What is this?** Refrigeration Technologies-RT100S Big Blu Micro Leak Detector 1 Qt by refrigeration technologies
- **How much does it cost?** $62.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/144961588-refrigeration-technologies-rt100s-big-blu-micro-leak-detector-1-qt)

## Best For

- refrigeration technologies enthusiasts

## Why This Product

- Trusted refrigeration technologies brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Across Industries:** Trusted by HVAC, aerospace, telecom, and gas utilities professionals worldwide for reliable, fast diagnostics.
- • **Pinpoint Micro Leaks Instantly:** Detects gas leaks down to an ultra-sensitive 0.65 oz/year, so nothing slips past your inspection.
- • **Non-Corrosive & Surface-Adherent:** Formulated to cling and stay put—even on vertical pipes—ensuring persistent, visible leak detection.
- • **Long-Lasting Blue Bubble Indicator:** Creates thick, vibrant bubbles that don’t pop, making leak locations unmistakably clear every time.
- • **Certified Safe for Food Environments:** NSF certification means you can confidently use it around food without compromising safety or compliance.

## Overview

The Refrigeration Technologies RT100S Big Blu Micro Leak Detector is a top-tier, NSF-certified leak detection liquid that identifies micro gas leaks as small as 0.65 oz/year. Its non-corrosive, film-forming formula clings to surfaces—including vertical pipes—producing long-lasting blue bubbles that highlight leaks instantly. Widely used across HVAC, aerospace, telecom, and gas utilities, this trusted solution ensures fast, accurate diagnostics while being safe for use around food environments.

## Description

There is no better solution than OEM’s detector that can find out gas leakages faster. It is commonly used in HVAC, plumbing, telecom, aerospace, gas utilities, service industries and MVAC. This is a strong and persistent film forming liquid, capable of detecting micro gas leakages effectively. Industries that use pressurized gas systems can make use of this advanced propriety formulation. Currently, it is one of the most popular products used by many service technicians throughout the US, Canada, Japan and the Pacific Rim.

Review: "The Gold Standard for Leak Detection—Works on Everything!" - Refrigeration Technologies Big Blu (RT100S) is hands-down the best leak detector solution on the market. If you need to find a leak in HVAC, refrigeration lines, or anything pressurized, this is the stuff to get. The solution is thick, highly visible, and produces large, long-lasting blue bubbles that instantly pinpoint even the smallest leaks, making diagnosis incredibly fast and easy. What makes this product truly exceptional is its versatility. Beyond my professional use in HVAC work, I successfully used this exact bottle to find tiny, slow leaks in my car tires and even a bike tube! Just brush it on the valve stem and around the tire bead, and the bubbles pop up right where the air is escaping. It’s non-corrosive, safe on all materials, and the included applicator brush is perfect. It works flawlessly every time I use it. This product is an essential item for any technician's toolbox and a great homeowner problem-solver.
Review: Works well, saturates the surface area being addressed - This refrigerant leak detectant coated, and remained in place, even when sprayed on vertical pipe. The bubbles, that are created from a refrigerant leak, do not pop. It will create a mass of bubbles that continue to collect on the location of the leak. I’ve used off brands, and other manufacturers. Yet, in my personal opinion, this product works more efficiently, and clings to surfaces, better than the competition.

## Features

- NSF certified for use around food
- Non-Corrosive
- Detects Micro Leaks down to 0.65 oz/year
- Safe of any type of gas

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005IT8EI8 |
| Best Sellers Rank | #65,405 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #50 in Leak Detection Tools |
| Date First Available | June 1, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.36 pounds |
| Item model number | RT100S |
| Manufacturer | Refrigeration Technologies |
| Product Dimensions | 3.25 x 3.25 x 12.25 inches |

## Product Details

- **Brand:** Refrigeration Technologies
- **Item Volume:** 1 Quarts
- **Unit Count:** 1.0 Count
- **Number of Items:** 1
- **Item Weight:** 2.4 Pounds

## Images

![Refrigeration Technologies-RT100S Big Blu Micro Leak Detector 1 Qt - Image 1](https://m.media-amazon.com/images/I/51APEOSSOGL.jpg)

## Questions & Answers

**Q: How hard is this to clean up, and will residue have any effect no gauges, refrigerant etc?**
A: This is only for spraying the outside of HVAC equipment.  Should have no contact with refrigerant or gauges.  I normally follow up with a similar spray bottle filled only with water. A few spritzes and the residue is gone.  Schrader valves need to be dried after water.

**Q: Does it change color?**
A: No,just shows bubbles

**Q: Packaging was terrible, leaked fuid all over, maybe cracked? Everyone else having this issue?**
A: No

**Q: Why does description say battery powered?**
A: I wouldn't know  it's a spray bottle no battery

## Customer Reviews

### ⭐⭐⭐⭐⭐ "The Gold Standard for Leak Detection—Works on Everything!"
*by A***. on December 10, 2025*

Refrigeration Technologies Big Blu (RT100S) is hands-down the best leak detector solution on the market. If you need to find a leak in HVAC, refrigeration lines, or anything pressurized, this is the stuff to get. The solution is thick, highly visible, and produces large, long-lasting blue bubbles that instantly pinpoint even the smallest leaks, making diagnosis incredibly fast and easy. What makes this product truly exceptional is its versatility. Beyond my professional use in HVAC work, I successfully used this exact bottle to find tiny, slow leaks in my car tires and even a bike tube! Just brush it on the valve stem and around the tire bead, and the bubbles pop up right where the air is escaping. It’s non-corrosive, safe on all materials, and the included applicator brush is perfect. It works flawlessly every time I use it. This product is an essential item for any technician's toolbox and a great homeowner problem-solver.

### ⭐⭐⭐⭐⭐ Works well, saturates the surface area being addressed
*by C***Y on June 11, 2024*

This refrigerant leak detectant coated, and remained in place, even when sprayed on vertical pipe. The bubbles, that are created from a refrigerant leak, do not pop. It will create a mass of bubbles that continue to collect on the location of the leak. I’ve used off brands, and other manufacturers. Yet, in my personal opinion, this product works more efficiently, and clings to surfaces, better than the competition.

### ⭐⭐⭐⭐⭐ I love this stuff!! It is so good!!
*by M***. on June 21, 2025*

I love this stuff! It is so good! I wish it came it a smaller size for people doing a DIY mini split install. I used 10 pump's, the rest will go to wast. Sad Face!!!

## Frequently Bought Together

- Refrigeration Technologies-RT100S Big Blu Micro Leak Detector 1 Qt
- Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack)
- Zoizocp R410A Adapter 5/16 inches SAE Female to 1/4 inches SAE Male Flare for Air Conditioners HVAC, 2 Straight Adapter + 2 Angled Adapter

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-28*