---
product_id: 61209107
title: "CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules"
brand: "chemetrics"
price: "17720 kr"
currency: ISK
in_stock: true
reviews_count: 2
category: "Chemetrics"
url: https://www.desertcart.is/products/61209107-chemetrics-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30
store_origin: IS
region: Iceland
---

# 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:** 17720 kr
**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?** 17720 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/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

- • **Vacuum-Sealed Freshness:** Ampoules are vacuum-sealed to maintain reagent integrity and extend shelf life, so your tests stay accurate every time.
- • **Compact & Portable Design:** Small package size (2.9 x 10.9 x 8.6 cm) and lightweight (1 lb) for easy storage and transport in any professional lab or field setting.
- • **Trusted American Manufacturing:** Proudly made in the USA by CHEMetrics, a leader in water analysis reagents, ensuring top-tier quality and support.
- • **Bulk Refill Pack for Continuous Use:** 30 ampoules per refill pack means you’re always ready for multiple tests without frequent reordering—ideal for busy labs and water quality pros.
- • **Precision Ampoules for Accurate Testing:** Each sealed glass ampoule contains 0.5 mL of reagent, ensuring consistent and reliable dissolved oxygen measurements.

## Overview

The CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill offers 30 vacuum-sealed glass ampoules, each containing 0.5 mL of Rhodazine D reagent for colorimetric water oxygen analysis. Compact and lightweight, these precision ampoules are made in the USA, designed for reliable, consistent dissolved oxygen testing in professional and industrial environments.

## 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 | #589,715 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #195 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://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)

## 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

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-22*