--- product_id: 734408930 title: "HM Digital TDS Meter Calibration Fluid 342ppm, 90ml Bottle, Sodium Chloride Solution (NaCl)" brand: "hm digital" price: "€ 57.81" currency: EUR in_stock: true url: https://www.desertcart.ie/products/734408930-hm-digital-tds-meter-calibration-fluid-342ppm-90ml-bottle-sodium store_origin: IE region: Ireland --- # Compatible with KCL-5 & 700US meters 90ml leak-proof HDPE bottle 342ppm precise calibration HM Digital TDS Meter Calibration Fluid 342ppm, 90ml Bottle, Sodium Chloride Solution (NaCl) **Brand:** hm digital **Price:** € 57.81 **Availability:** ✅ In Stock ## Summary > ⚡ Calibrate like a pro — never second-guess your water quality again! ## Quick Answers - **What is this?** HM Digital TDS Meter Calibration Fluid 342ppm, 90ml Bottle, Sodium Chloride Solution (NaCl) by hm digital - **How much does it cost?** € 57.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/734408930-hm-digital-tds-meter-calibration-fluid-342ppm-90ml-bottle-sodium) ## 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 - • **Universal Compatibility:** Works seamlessly with popular models like KCL-5 (362ppm) and 700US meters. - • **Compact & Leak-Proof Design:** 90ml HDPE bottle with a secure lid for mess-free, on-the-go calibration. - • **Essential for Water Quality Pros:** A must-have for professionals demanding precise TDS measurements every time. - • **Reliable Sodium Chloride Formula:** Trusted NaCl reagent guarantees consistent and repeatable calibration results. - • **Precision-Calibrated for Accuracy:** Ensure your TDS meter reads flawlessly with a stable 342ppm NaCl solution at 25°C. ## Overview This 90ml HDPE bottle contains a 342ppm sodium chloride (NaCl) calibration solution designed for precise TDS meter calibration at 25°C. Leak-proof and compatible with KCL-5 and 700US meters, it ensures reliable, repeatable water quality measurements for professionals. ## Description To use: 1) may be low in room temperature, calibration bottles in a nylon bag, to be warmed up to + 25 °C in lukewarm water. (2) Open the lid and insert the probe and calibration. Measure the liquid temperature 3) @ 25 °C in the temperature calibration fluid quickly "342ppm" to the calibration. Please note: Keep your TDS meter calibration fluid into the sticking on the impurities prior to inserting probe in distilled water and rinse. After using the calibration fluid is the lid to save. ## Features - Includes:: With a 342ppm NaCl Sodium Chloride reagent concentration @ 25 °C - Quantity: 90ml/CC - Container Material: HDPE Plastic, leak proof lid - Compatibility: kcl-5 362ppm, 700US ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001VE99X8 | | Best Sellers Rank | #24,133 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Electrolyte Solutions | | Brand | HM Digital | | Brand Name | HM Digital | | Container Type | Bottle | | Customer Reviews | 4.4 out of 5 stars 873 Reviews | | Global Trade Identification Number | 00891144000014 | | Item Form | Liquid | | Item Volume | 90 Milliliters | | Item Weight | 100 Grams | | Manufacturer | HM Digital, Inc. | | Model Number | C-342 | | Package Information | Bottle | | Part Number | C342 | | UPC | 891144000014 | | Unit Count | 1.0 Count | | Volume | 90 Milliliters | ## Product Details - **Brand:** HM Digital - **Item Weight:** 100 Grams - **Item Volume:** 90 Milliliters - **Item Form:** Liquid - **UPC:** 891144000014 ## Images ![HM Digital TDS Meter Calibration Fluid 342ppm, 90ml Bottle, Sodium Chloride Solution (NaCl) - Image 1](https://m.media-amazon.com/images/I/61U5LTc9u8L.jpg) ![HM Digital TDS Meter Calibration Fluid 342ppm, 90ml Bottle, Sodium Chloride Solution (NaCl) - Image 2](https://m.media-amazon.com/images/I/61U5LTc9u8L.jpg) ![HM Digital TDS Meter Calibration Fluid 342ppm, 90ml Bottle, Sodium Chloride Solution (NaCl) - Image 3](https://m.media-amazon.com/images/I/71o0Ok-W+WL.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. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ie/products/734408930-hm-digital-tds-meter-calibration-fluid-342ppm-90ml-bottle-sodium](https://www.desertcart.ie/products/734408930-hm-digital-tds-meter-calibration-fluid-342ppm-90ml-bottle-sodium) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-06-01*