---
product_id: 2872346
title: "HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue"
brand: "hm digital"
price: "₨7265"
currency: LKR
in_stock: true
reviews_count: 13
category: "Hm Digital"
url: https://www.desertcart.lk/products/2872346-hm-digital-c342-tds-and-ec-calibration-solution-342-ppm
store_origin: LK
region: Sri Lanka
---

# Foam liner sealed freshness 90 ml lightweight HDPE bottle 342 ppm NaCl precision HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue

**Brand:** hm digital
**Price:** ₨7265
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue by hm digital
- **How much does it cost?** ₨7265 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/2872346-hm-digital-c342-tds-and-ec-calibration-solution-342-ppm)

## 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

- • **Foam-Lined Seal for Purity:** Maintains solution integrity, so your calibration is always reliable and contamination-free.
- • **Precision-Calibrated 342 ppm NaCl:** Ensure your TDS meter reads with laboratory-grade accuracy every time.
- • **Compact & Lightweight 90 ml Bottle:** Portable design fits effortlessly in your professional toolkit or lab drawer.
- • **Trusted by Experts for Consistency:** Join thousands of professionals who rely on HM Digital for flawless water quality testing.
- • **Long-Lasting Supply for Periodic Use:** Enough solution to keep your device perfectly calibrated for years—never miss a beat.

## Overview

The HM Digital C342 Calibration Solution offers a precise 342 ppm NaCl concentration in a convenient 90 ml HDPE bottle sealed with a foam liner to ensure purity. Designed for periodic recalibration of HM Digital TDS meters and water quality testers, it guarantees accurate, reliable readings trusted by professionals worldwide.

## Description

Product Description TDS Meter NaCl Calibration Solution C-342. From the Manufacturer TDS Meter NaCl Calibration Solution C-342.

Review: Accurate - Works fine
Review: Great item to have - It is good to have this to calibrate my TDS tester. I have never needed to calibrate my tester but decided to make sure that it still works after 3 years ilof periodic usage. Only issue is the cost and there is so much of it that I won't need to use again for a few more years.

## Features

- NaCl calibration solution, available in 342 ppm or 1000 ppm
- Comes in lightweight HDPE plastic bottles
- Sealed with a coated foam liner
- Use the HM Digital TDS Calibration Solution (342 PPM) to periodically re-calibrate your HM Digital TDS meter or HM Digital Water Quality Tester
- This HM Digital TDS Calibration Solution is also known as Water Tester Solution andTDS Meter Calibration Solution
- The C-342 is NaCl solution (342 PPM)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001VE99X8 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #28,449 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Electrolyte Solutions |
| Color | Transparent/Blue |
| Customer Reviews | 4.4 4.4 out of 5 stars (854) |
| Date First Available | March 11, 2009 |
| Global Trade Identification Number | 00891144000014 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 3.53 ounces |
| Item model number | C-342 |
| Manufacturer | HM Digital, Inc. |
| Number Of Pieces | 1 |
| Part Number | C342 |
| Product Dimensions | 1.75 x 1.75 x 3 inches |
| Size | 342ppm, 90 ml Capacity |
| UPC | 891144000014 |

## Product Details

- **Brand:** HM Digital
- **Item Form:** Liquid
- **Item Volume:** 90 Milliliters
- **Item Weight:** 100 Grams
- **Package Information:** Bottle

## Images

![HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue - Image 1](https://m.media-amazon.com/images/I/61U5LTc9u8L.jpg)

## Questions & Answers

**Q: What is the shelf life?**
A: Room temp. indefinitely.  You will use it up before it gets really old.

**Q: Whats the ppm at 19 degree Celsius? or 18.6? The box only states the ppm of the solution at 25C which is is 342 ppm**
A: I doubt the actual PPM is much different between 19C and 25C.  TDS/EC meters are typically sensitive to temperature and some include a temperature sensor for automatic correction.  Others that don't automatically compensate for temperature and may need a "look-up" to correct during the calibration.  In either case, the reference solution concentration probably doesn't change much as a function of temperature.  Good luck with your TDS calibration!

**Q: Can you mix this with 1000 solution to get 680ish ppm mix?**
A: All you need to do to create a 680 ppm test solution is add .068 grams of table salt to 100ml of distilled or RODI water and dissolve and viola you have a 680 ppm test solution.

**Q: What screwdriver is used to calibrate this meter? The little ones I've used don't turn anything.**
A: Usually there is a small area on the back of the meter that takes a tiny Phillips head screwdriver. You would put the meter in the solution and then use the screwdriver to make sure it's reading 342.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Accurate
*by M***I on September 27, 2025*

Works fine

### ⭐⭐⭐⭐⭐ Great item to have
*by D***G on February 12, 2025*

It is good to have this to calibrate my TDS tester. I have never needed to calibrate my tester but decided to make sure that it still works after 3 years ilof periodic usage. Only issue is the cost and there is so much of it that I won't need to use again for a few more years.

### ⭐⭐⭐⭐⭐ Works great as described
*by J***6 on January 24, 2026*

Works great excellent product. Brought everything door needed to be for collaboration of calibration.

## 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 Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-24*