---
product_id: 54009866
title: "HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml)"
brand: "hm digital"
price: "€ 46.30"
currency: EUR
in_stock: true
reviews_count: 8
category: "Hm Digital"
url: https://www.desertcart.fr/products/54009866-hm-digital-342ppm-tds-calibration-solution-a-k-a-water
store_origin: FR
region: France
---

# Sealed with coated foam liner for airtight freshness Compact 90 ml lightweight HDPE bottle Precise 342 ppm NaCl calibration HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml)

**Brand:** hm digital
**Price:** € 46.30
**Availability:** ✅ In Stock

## Summary

> 💧 Calibrate like a pro, measure like a boss.

## Quick Answers

- **What is this?** HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml) by hm digital
- **How much does it cost?** € 46.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/54009866-hm-digital-342ppm-tds-calibration-solution-a-k-a-water)

## Best For

- hm digital enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Portable:** Sleek 90 ml bottle fits effortlessly in your toolkit or lab, perfect for on-the-go professionals.
- • **Trusted by Experts:** Join thousands of professionals who rely on this solution to maintain water testing accuracy and confidence.
- • **Universal Compatibility:** Specifically formulated for HM Digital TDS meters and water quality testers, making recalibration seamless.
- • **Airtight Seal for Longevity:** Coated foam liner guarantees solution integrity, so you never worry about contamination or evaporation.
- • **Precision Calibration, Always:** Ensure your TDS meter delivers spot-on water quality readings every time with the trusted 342 ppm NaCl solution.

## Overview

The HM Digital 342 ppm TDS Calibration Solution is a 90 ml NaCl-based liquid designed to recalibrate HM Digital TDS meters and water quality testers. Packaged in a lightweight, durable HDPE bottle with a coated foam liner, it ensures precise, reliable water quality measurements by maintaining solution purity and stability.

## Description

La solución tampón/de calibración HM Digital TDS 342 ppm (90 ml) se presenta en botellas de plástico ligeras y puede recalibrarse periódicamente.

Review: Small Bottle, Use Again - I calibrated my TDS meter just fine. I used a better air tight jar and poured it all into it, that way I can use it multiple times. I will buy again. Delivery good.
Review: Very useful - Very useful for a window cleaner

## Features

- The C-342 is NaCl solution (342 PPM)
- This HM Digital TDS Calibration Solution is also known as Water Tester Solution andTDS Meter Calibration Solution
- Use the HM Digital TDS Calibration Solution (342 PPM) to periodically re-calibrate your HM Digital TDS meter or HM Digital Water Quality Tester
- Sealed with a coated foam liner
- Comes in lightweight HDPE plastic bottles

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001VE99X8 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 62,960 in Garden ( See Top 100 in Garden ) 218 in Pool & Hot Tub Testers |
| Customer Reviews | 4.4 4.4 out of 5 stars (814) |
| Date First Available | 23 May 2012 |
| Global Trade Identification Number | 00891144000014 |
| Item Package Quantity | 1 |
| Item Weight | 100 g |
| Item model number | C-342 |
| Manufacturer | HM Digital |
| Number of Pieces | 1 |
| Part number | C342 |
| Product Dimensions | 4.45 x 4.45 x 7.62 cm; 100 g |
| UPC | 891144000014 |

## Product Details

- **Brand:** HM Digital
- **Item form:** Liquid
- **Item volume:** 90 Millilitres
- **Item weight:** 100 Grams
- **Package information:** Bottle

## Images

![HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml) - Image 1](https://m.media-amazon.com/images/I/31EdoXtavdL.jpg)
![HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml) - Image 2](https://m.media-amazon.com/images/I/41Ewcy8YSML.jpg)
![HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml) - Image 3](https://m.media-amazon.com/images/I/61U5LTc9u8L.jpg)
![HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml) - Image 4](https://m.media-amazon.com/images/I/71o0Ok-W+WL.jpg)

## Questions & Answers

**Q: My two tds meters read 150ppm and 160ppm in the solution. what am i doing wrong.**
A: The reason for the discrepancy is that the TDS meters are not calibrated. You need to re-calibrate them following  the manufacturers instructions.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Small Bottle, Use Again
*by J***O on 16 April 2025*

I calibrated my TDS meter just fine. I used a better air tight jar and poured it all into it, that way I can use it multiple times. I will buy again. Delivery good.

### ⭐⭐⭐⭐⭐ Very useful
*by D***S on 29 October 2019*

Very useful for a window cleaner

### ⭐⭐⭐⭐ Calibration solution.
*by R***N on 19 July 2024*

I have had a TDS pen for several years until recently it started to play up. so a battery change and a rest was well over due. The solution was a quick and easy method and it worked well.

## Frequently Bought Together

- HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue
- HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy
- HM Digital 1000ppm TDS Calibration Solution

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-02-01*