---
product_id: 90313179
title: "Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz."
brand: "taylor technologies"
price: "€ 75.20"
currency: EUR
in_stock: true
category: "Taylor"
url: https://www.desertcart.es/products/90313179-taylor-technologies-r-0004-e-reagent-no-4-ph-indicator
store_origin: ES
region: Spain
---

# 4.7/5 customer rating Top 25 in Analytical Reagents 16 oz precision reagent Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz.

**Brand:** taylor technologies
**Price:** € 75.20
**Availability:** ✅ In Stock

## Summary

> 🧪 Stay ahead in water care with precision you can trust!

## Quick Answers

- **What is this?** Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz. by taylor technologies
- **How much does it cost?** € 75.20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/90313179-taylor-technologies-r-0004-e-reagent-no-4-ph-indicator)

## Best For

- taylor technologies enthusiasts

## Why This Product

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

## Key Features

- • **Precision pH Control:** Ensure perfect water balance with Taylor's trusted reagent.
- • **Generous 16 oz Volume:** Ample supply for multiple tests without constant repurchasing.
- • **Seamless Compatibility:** Designed as a direct replacement for Taylor Test Kits for hassle-free use.
- • **Trusted Industry Leader:** Taylor Technologies, a name synonymous with accuracy and reliability.
- • **Highly Rated by Professionals:** 4.7-star average from 166 expert users—join the satisfied community.

## Overview

Taylor Technologies R-0004-E Reagent No.4 is a 16 oz liquid pH indicator designed for accurate water testing. Ranked #24 in Analytical Reagents and boasting a 4.7-star rating from 166 users, it ensures reliable pH measurement and optimal water treatment, making it an essential tool for professionals maintaining perfect pool chemistry.

## Description

Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz.

## Features

- Replacement reagent for the Taylor Test Kits
- 16 oz bottle of pH Indicator # 4
- Taylor Reagent #: R-0004-E

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004155SZW |
| Best Sellers Rank | #15,917 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Analytical Reagents |
| Brand Name | Taylor Technologies |
| Customer Reviews | 4.7 4.7 out of 5 stars (166) |
| Item Form | Liquid |
| Item Type Name | Reagent No.4 pH Indicator |
| Item Weight | 16 Ounces |
| Manufacturer | Taylor Technologies |
| Manufacturer Part Number | R-0004-E |
| Model Number | R-0004-E |
| Number of Items | 1 |
| Product Benefits | Maintains proper pH levels for comfortable swimming and effective water treatment |
| UPC | 840036000236 840036000229 |
| Unit Count | 16.0 Ounce |

## Product Details

- **Brand:** Taylor Technologies
- **Item Form:** Liquid
- **Item Weight:** 16 Ounces
- **Product Benefits:** Maintains proper pH levels for comfortable swimming and effective water treatment
- **UPC:** 840036000236 840036000229

## Images

![Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz. - Image 1](https://m.media-amazon.com/images/I/71WPWFR2xuL.jpg)

## Questions & Answers

**Q: Are these bulk bottles meant for refilling the smaller dropper bottles? If not, how do you dispense the appropriate amount of reagent?**
A: Yes, you bulk bottles meant to refill the small dropper bottles that came with original test kit.

**Q: What is the shelf life?**
A: a couple of years at least , if stored in air cond. in the dark, or a couple of weeks in the sun. do not freeze

**Q: Can i use this product with my poolmaster test kit?  not just for measuring ph, but also for acid demand test?**
A: U put 5 drops in 44 ml of water ,yellow is 7.0, purple is 8.0 so 7.4 is a kinda orangy pink peachy. u will need the acid demand and base demand drops to add to ur test. So lets say ur pool is at 7.8 ph and you need it to be 7.4 You add however many drops it takes to change its color to peachy,then U figure how many cups of acid in the pool equals 1 drop probably 1 for a 15000 gal pool , start with 1 cup of muratic per drop for a 15000 gal pool  Acid Demand #: R-0005-A

**Q: what is the expiration date?**
A: Usually 2 years, just depends.

## Frequently Bought Together

- Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz.
- TAYLOR TECHNOLOGIES INC R-0871-E FAS-DPD TITRATING 16 OZ
- Taylor Replacement Reagent R-0870-J DPD Powder .25-Pound

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-07-09*