---
product_id: 61209107
title: "R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules"
brand: "chemetrics"
price: "€ 142.02"
currency: EUR
in_stock: true
reviews_count: 2
category: "Chemetrics"
url: https://www.desertcart.gr/products/61209107-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30-ampoules
store_origin: GR
region: Greece
---

# 7 mm OD glass ampoules for consistent testing 30 sealed ampoules for precise dosing Made in the USA for trusted quality R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules

**Brand:** chemetrics
**Price:** € 142.02
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules by chemetrics
- **How much does it cost?** € 142.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/61209107-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30-ampoules)

## 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 & Ready-to-Use:** Small 7 mm diameter glass ampoules fit seamlessly into your existing CHEMet test kits.
- • **Bulk Refill Convenience:** 30 ampoules per pack ensure you never run out during critical water analysis tasks.
- • **Precision in Every Drop:** Each ampoule contains 0.5 mL of reagent sealed under vacuum for accurate dissolved oxygen measurement.
- • **Sealed for Freshness & Safety:** Vacuum-sealed glass ampoules protect reagent integrity and prevent contamination.
- • **Trusted American Craftsmanship:** Manufactured in the USA, guaranteeing high-quality standards and reliability.

## Overview

The CHEMetrics R-7540 CHEMets Dissolved Oxygen Refill offers 30 vacuum-sealed 7 mm glass ampoules, each containing 0.5 mL of Rhodazine D reagent. Designed for precise colorimetric water oxygen testing, this USA-made refill pack ensures consistent, reliable results for professional 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 | #642,873 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #420 in Water Purification System Accessories |
| Brand | Chemetrics |
| Brand Name | Chemetrics |
| Customer Reviews | 3.2 out of 5 stars 3 Reviews |
| Manufacturer | CHEMetrics, Inc. |
| Model Number | R-7540 |
| Part Number | R-7540 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Chemetrics
- **Manufacturer:** CHEMetrics, Inc.
- **Unit Count:** 1 Count

## Images

![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

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-10-12*