---
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: "177 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Hm Digital"
url: https://www.desertcart.ro/products/54009866-hm-digital-342ppm-tds-calibration-solution-a-k-a-water
store_origin: RO
region: Romania
---

# Sealed with coated foam liner Compact 90 ml 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:** 177 Lei
**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?** 177 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

- • **Long-Lasting Seal:** Foam-lined cap guarantees airtight protection, preserving solution integrity for multiple uses.
- • **Compact & Portable:** Lightweight 90 ml bottle fits effortlessly into your toolkit or lab setup for on-the-go recalibration.
- • **Effortless Maintenance:** Simple, no-fuss recalibration keeps your water quality readings sharp and reliable—never miss a beat.
- • **Trusted by Professionals:** Join thousands of users who rely on HM Digital’s calibration solution for consistent water quality testing.
- • **Calibrate with Confidence:** Ensure your TDS meter delivers pinpoint accuracy 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 foam-lined cap, it ensures airtight sealing for repeated use, maintaining precise and reliable water testing accuracy.

## 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 | 40,107 in Garden ( See Top 100 in Garden ) 125 in Pool & Hot Tub Testers |
| Customer Reviews | 4.4 4.4 out of 5 stars (819) |
| 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/61U5LTc9u8L.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 Romania*
*Store origin: RO*
*Last updated: 2026-03-01*