---
product_id: 61209107
title: "CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules"
brand: "chemetrics"
price: "KD 30.70"
currency: KWD
in_stock: true
reviews_count: 2
category: "Chemetrics"
url: https://www.desertcart.com.kw/products/61209107-chemetrics-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30
store_origin: KW
region: Kuwait
---

# 7 mm outer diameter precision 30 sealed glass ampoules Made in USA quality CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules

**Brand:** chemetrics
**Price:** KD 30.70
**Availability:** ✅ In Stock

## Summary

> 🧪 Stay ahead in water quality testing with precision-packed ampoules!

## Quick Answers

- **What is this?** CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules by chemetrics
- **How much does it cost?** KD 30.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/61209107-chemetrics-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30)

## Best For

- chemetrics enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Portable Design:** Slim 2.9 x 8.6 x 10.9 cm packaging fits effortlessly into any professional field or lab kit.
- • **Visual Colorimetric Clarity:** Designed for easy-to-read color changes, empowering quick, on-the-spot dissolved oxygen measurements.
- • **Reliable American Manufacturing:** Proudly produced in the USA, guaranteeing high-quality standards and dependable supply chain.
- • **Bulk Refill Pack for Continuous Use:** 30 ampoules per pack keep your water testing workflow uninterrupted and cost-effective.
- • **Precision Ampoules for Accurate Testing:** Each 0.5 mL reagent ampoule is vacuum-sealed to ensure consistent, contamination-free dissolved oxygen analysis.

## Overview

The CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill offers 30 vacuum-sealed 0.5 mL glass ampoules designed for precise colorimetric water oxygen analysis. Compact and made in the USA, this refill pack supports continuous, reliable testing for professionals in environmental and industrial water quality monitoring.

## Description

Sealed glass ampoules, 7 mm OD, for visual colorimetric water analysis. Each CHEMet ampoule contains approximately 0.5 mL of liquid reagent sealed under vacuum. Refills contain 30 ampoules, test kits contain 1 refill.

Review: wrong purple color - for some reason the test turn purple and it doesnt match with the color on the sample reading table. (the color on the table is blue) is this a defective product? or did I order the wrong color by mistake? I was not aware of different colors for this test. thanks,
Review: Broken on arrival - Some of the ampules came in broken. Then when I used it they were also purple and did not match the kit which is blue. They did refund my order though

## Features

- Package Dimensions: 2.9 L x 10.9 H x 8.6 W (centimeters)
- Package Weight : 1 pounds
- Country of Origin : United States
- Part number: R-7540

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01622NFO2 |
| Best Sellers Rank | #932,297 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #302 in Water Purification System Accessories |
| Date First Available | December 21, 2017 |
| Item Weight | 4 ounces |
| Item model number | R-7540 |
| Manufacturer | CHEMetrics, Inc. |
| Package Dimensions | 4.29 x 3.39 x 1.14 inches |

## Images

![CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules - Image 1](https://m.media-amazon.com/images/I/61k7v4naoPL.jpg)

## Customer Reviews

### ⭐⭐ wrong purple color
*by A***Z on June 11, 2020*

for some reason the test turn purple and it doesnt match with the color on the sample reading table. (the color on the table is blue) is this a defective product? or did I order the wrong color by mistake? I was not aware of different colors for this test. thanks,

### ⭐⭐ Broken on arrival
*by M***. on July 20, 2021*

Some of the ampules came in broken. Then when I used it they were also purple and did not match the kit which is blue. They did refund my order though

---

## 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.com.kw/products/61209107-chemetrics-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30](https://www.desertcart.com.kw/products/61209107-chemetrics-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30)

---

*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-03-04*