---
product_id: 61209107
title: "R-7540 CHEMets Dissolved Oxygen Refill, Rhodazine D, 30 Ampoules"
brand: "chemetrics"
price: "$145.02"
currency: USD
in_stock: true
category: "Chemetrics"
url: https://www.desertcart.us/products/61209107-r-7540-chemets-dissolved-oxygen-refill-rhodazine-d-30-ampoules
store_origin: US
region: United States of America
---

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

**Brand:** chemetrics
**Price:** $145.02
**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?** $145.02 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/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:** Slim 7 mm diameter glass ampoules fit seamlessly into your existing CHEMet test kits.
- • **Consistent Accuracy Every Time:** Each ampoule contains 0.5 mL of reagent sealed under vacuum for reliable colorimetric water analysis.
- • **Trusted American Manufacturing:** Proudly made in the USA, guaranteeing quality and compliance with industry standards.
- • **Bulk Supply for Continuous Testing:** 30 ampoules per refill ensure you never run out during critical dissolved oxygen measurements.
- • **Optimized for Water Purification Pros:** Ranked #354 in Water Purification Accessories, a go-to choice for lab and field professionals.

## Overview

The R-7540 CHEMet Dissolved Oxygen Refill by CHEMetrics includes 30 sealed 7 mm glass ampoules, each containing 0.5 mL of Rhodazine D reagent under vacuum. Designed for accurate colorimetric water testing, this USA-made refill supports continuous dissolved oxygen monitoring and fits standard CHEMet test kits.

## 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.

## 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 | #614,949 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #354 in Water Purification System Accessories |
| Brand Name | Chemetrics |
| Customer Reviews | 3.2 3.2 out of 5 stars (3) |
| 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)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-18*