---
product_id: 53490323
title: "Phenol Red Tablets - 250 Pack - Professional-Grade Reagents for Digital Photometers| Reliable, Easy-to-Use & Accurate Water Testing"
brand: "lovibond"
price: "₨20848"
currency: LKR
in_stock: true
reviews_count: 13
category: "Lovibond"
url: https://www.desertcart.lk/products/53490323-phenol-red-tablets-250-pack-professional-grade-reagents-for-digital
store_origin: LK
region: Sri Lanka
---

# ±0.01 pH accuracy Rapid 1-5 sec dissolution Eco-friendly, boric acid-free Phenol Red Tablets - 250 Pack - Professional-Grade Reagents for Digital Photometers| Reliable, Easy-to-Use & Accurate Water Testing

**Brand:** lovibond
**Price:** ₨20848
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead of the curve with precision pH testing that professionals swear by!

## Quick Answers

- **What is this?** Phenol Red Tablets - 250 Pack - Professional-Grade Reagents for Digital Photometers| Reliable, Easy-to-Use & Accurate Water Testing by lovibond
- **How much does it cost?** ₨20848 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/53490323-phenol-red-tablets-250-pack-professional-grade-reagents-for-digital)

## Best For

- lovibond enthusiasts

## Why This Product

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

## Key Features

- • **Safe & Sustainable:** Boric acid-free, blister-packed tablets designed for safe handling and environmental care.
- • **Speed Meets Simplicity:** Rapid dissolving tablets that give instant, vibrant color changes for quick interpretation.
- • **Precision You Can Trust:** Professional-grade reagents delivering lab-accurate pH readings every time.
- • **Chlorine-Resistant Reliability:** Neutralizes chlorine interference to ensure consistent, true pH results in treated water.
- • **Versatile for Pros & Hobbyists:** Ideal for pools, spas, aquariums, and municipal water testing—trusted by experts worldwide.

## Overview

Lovibond Phenol Red Tablets come in a 250-pack of professional-grade, chlorine-resistant reagents designed for digital photometers. They dissolve rapidly within 1-5 seconds, producing a clear multicolored shift for precise pH measurement with ±0.01 accuracy. Eco-friendly and boric acid-free, these tablets are blister-packed for safe, long-lasting use in pools, spas, aquariums, and water treatment settings.

## Description

Buy Lovibond Phenol Red Tablets - 250 Pack - Professional-Grade Reagents for Digital Photometers| Reliable, Easy-to-Use & Accurate Water Testing at desertcart UK. Free delivery on eligible orders.

Review: They work well - They work well
Review: Great for rapid testing of spa or pool pH levels - I bought these as my kit had run out of tablets. Originally I ordered the 'non' rapid tablets which aren't great. These rapid ones as soon as you put them in the test tube and shake for 1-5 seconds have dissolved and changed colour to read PH. Note- they are only refill tablets no kit included you will need that separately.

## Features

- PHOTOMETRIC PRECISION FOR PHOTOMETER WATER TESTING KITS – Lovibond Phenol Red pH Photometer Reagents are developed for use with photometers, ensuring precise results in every test. Essential for any pool, aquarium & hot tub testing kit, each tablet delivers exact reagent dosing for accurate water pH readings.
- RELIABLE TESTING FOR SWIMMING POOL MAINTENANCE – Trusted by water treatment professionals and laboratory technicians, these pH balance tablets offer stable, consistent results. Ideal for swimming pools, spas, aquariums, and home use, they suit both professionals and hobbyists alike.
- CLEAR COLOUR CHANGE FOR EASY READING – Using phenol red, each tablet produces a vibrant, multicoloured shift when dissolved. Designed for compatibility with digital photometers, they enhance the performance of any testing kit and make pH readings simple to interpret.
- CHLORINE-RESISTANT FOR ACCURATE RESULTS – With added thiosulphate to neutralise chlorine, these tablets provide reliable results even in treated water. Whether used as a water pH tester in a residential pool or municipal setting, they help maintain precise pH balance.
- ECO-FRIENDLY, USER-FRIENDLY, BUILT TO LAST – Blister-packed to ensure no direct contact, the tablets are boric acid-free and safe for pools and spas. Their durable foil packaging maintains quality, making them ideal for swimming pool maintenance kits used at home, in education, or professionally.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00WRCNQVE |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 5,226 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 780 in Lab & Scientific Products |
| Colour | multicoloured |
| Customer Reviews | 4.4 4.4 out of 5 stars (216) |
| Date First Available | 7 Nov. 2016 |
| Item Package Quantity | 1 |
| Item Weight | 28.3 g |
| Item model number | 511771BT |
| Manufacturer | Astralpool |
| Part number | 511771BT FBM |
| Style | Box |

## Product Details

- **Brand:** Lovibond
- **Manufacturer:** Astralpool
- **Recommended uses for product:** ph measurement in photometers

## Images

![Phenol Red Tablets - 250 Pack - Professional-Grade Reagents for Digital Photometers| Reliable, Easy-to-Use & Accurate Water Testing - Image 1](https://m.media-amazon.com/images/I/71q2zTmsS2L.jpg)

## Questions & Answers

**Q: Do all these Lovibond tablets work with the Poollab 1.0?**
A: Probably not due to the possible differences in wavelengths used for testing , some customers report alkalinity dont.

**Q: are these the correct ones for the poollab 1.0 photometer please**
A: Some customers have used and not reported problems for dpd 1 and ph

**Q: Title says phenol red but picture shows Dpd1, which tablets would I receive if I ordered this?**
A: Thank you for your enquiry. Apologies for the confusion we will change the image. You will receive the Lovibond Phenol Red Photometer 250 pH tablets Code: 511771bt

**Q: Do these and the free chlorine tabs have use by dates? If so how long can they be stored? Thanks**
A: Yes the ones I received had a 10 year use by date on them.

## Customer Reviews

### ⭐⭐⭐⭐⭐ They work well
*by B***R on 1 September 2025*

They work well

### ⭐⭐⭐⭐⭐ Great for rapid testing of spa or pool pH levels
*by A***J on 2 September 2023*

I bought these as my kit had run out of tablets. Originally I ordered the 'non' rapid tablets which aren't great. These rapid ones as soon as you put them in the test tube and shake for 1-5 seconds have dissolved and changed colour to read PH. Note- they are only refill tablets no kit included you will need that separately.

### ⭐ Would not dissolve
*by A***R on 25 October 2025*

Did not work at all as would not dissolve, returned this item

## Frequently Bought Together

- Lovibond Phenol Red Tablets - 250 Pack - Professional-Grade Reagents for Digital Photometers| Reliable, Easy-to-Use & Accurate Water Testing
- Certikin - DPD No 1 Chlorine Tablets | 250 Count for Photometer | Measures Chlorine, Bromine, Ozone | Long Shelf Life, Easy to Use | Suitable for Photometers, Multicoloured
- Certikin - DPD No 3 Total Chlorine Tablets | Precise Dosing & Long Shelf Life | Photometer & Comparator Compatible | Eco-Friendly Chemistry | High Accuracy, Multicoloured, 250 Pack

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-16*