--- product_id: 181297672 title: "Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector Blue" brand: "refrigeration technologies" price: "NZ$50" currency: NZD in_stock: true reviews_count: 8 category: "Refrigeration Technologies" url: https://www.desertcart.nz/products/181297672-refrigeration-technologies-rt175b-big-blu-brush-on-microleak-detector-blue store_origin: NZ region: New Zealand --- # Detects leaks as small as 0.74 oz/year Brush-on applicator with 10-inch extension dauber NSF certified & non-corrosive formula Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector Blue **Brand:** refrigeration technologies **Price:** NZ$50 **Availability:** ✅ In Stock ## Summary > 🔍 Spot the Invisible, Save the Day! ## Quick Answers - **What is this?** Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector Blue by refrigeration technologies - **How much does it cost?** NZ$50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/181297672-refrigeration-technologies-rt175b-big-blu-brush-on-microleak-detector-blue) ## 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 - • **Safe for All Gases & Surfaces:** NSF certified and non-corrosive, ensuring safe use around food and all pressurized systems. - • **Effortless Brush-On Application:** Innovative brush-on bottle with extension dauber for targeted, mess-free detection in hard-to-reach spots. - • **Elevate Your Leak Detection Game:** Don’t settle for soapy water—upgrade to a thick, film-forming formula that reveals micro leaks others miss. - • **Pinpoint Micro Leaks with Precision:** Detect leaks down to an ultra-sensitive 0.74 oz/year—spot problems before they escalate. - • **Trusted by Industry Leaders Worldwide:** Preferred by HVAC, aerospace, telecom, and gas utility pros for reliable, persistent leak detection. ## Overview The Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector is a professional-grade, NSF certified leak detection solution that identifies micro gas leaks as small as 0.74 oz/year. Featuring a brush-on applicator with a 10-inch extension dauber, it delivers precise, mess-free application. Non-corrosive and safe for all gases and food environments, it’s trusted globally by HVAC, aerospace, telecom, and gas utility professionals for reliable, persistent leak detection. ## Description This is our original Big Blu microleak detector downsized into a Brush On applicator. This product is great for spot leak applications and is supplied with a 10 inch extension dauber. Big Blu is a well-established bubble leak detector solution capable of detecting micro gas leakage down to 0.65 oz/yr. It is a strong persistent film forming liquid that has excelled in the field identification of gas leaks. Big Blu is used by OEM’s and industry professionals worldwide. Suitable for use with all gases to detect leaks on any pressurized system. Commonly used in HVAC, plumbing, telecom, aerospace, gas utilities, service industries and MVAC. Review: Simple but effective product - This is not your typical soapy water. This is some thick stuff. Normally I use soapy water or some type of cleaner and wanted something more sensitive. While this takes a little time for stuff to show, this is quite good at showing the micro leaks. I’m very pleased at this for the price as this helps finding a tiny leak when a leak detector can’t find it when it’s a little breezy. Review: Good product. - Great product that everyone should have around for checking for possible leaks ## Features - NSF certified for use around food - Non-Corrosive - Detects Micro Leaks down to 0.74 oz/year - Safe of any type of gas - Brush on Bottle ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.7 out of 5 stars 392 Reviews | ## Product Details - **Brand:** Refrigeration Technologies - **Style:** simple - **Power Source:** Gas Powered - **Color:** Blue - **Item Weight:** 0.01 Ounces - **Alarm:** Audible - **Sensor Type:** Photoelectric - **Number of Items:** 1 - **Manufacturer:** Refrigeration Technologies - **UPC:** 017857175089 ## Images ![Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector Blue - Image 1](https://m.media-amazon.com/images/I/61MMXE0a5WL.jpg) ## Questions & Answers **Q: Can you please clarify the product description? is this product "brush on blu micro leak detector - dauber part #rt175b"** A: Yes it is. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple but effective product *by O***B on January 4, 2026* This is not your typical soapy water. This is some thick stuff. Normally I use soapy water or some type of cleaner and wanted something more sensitive. While this takes a little time for stuff to show, this is quite good at showing the micro leaks. I’m very pleased at this for the price as this helps finding a tiny leak when a leak detector can’t find it when it’s a little breezy. ### ⭐⭐⭐⭐⭐ Good product. *by Z***1 on March 11, 2026* Great product that everyone should have around for checking for possible leaks ### ⭐⭐⭐⭐⭐ Easy to use and accurate *by M***J on May 11, 2025* Best leak detection that I have used. You will know one way or the other if you have a leak. Simple and trustworthy. ## Frequently Bought Together - Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector Blue - Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack) - Appion MGAVCT 1/4" MegaFlow Vacuum-Rated Valve Core Removal Tool --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nz/products/181297672-refrigeration-technologies-rt175b-big-blu-brush-on-microleak-detector-blue](https://www.desertcart.nz/products/181297672-refrigeration-technologies-rt175b-big-blu-brush-on-microleak-detector-blue) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-07-05*