--- product_id: 3671970 title: "HM Digital 1000ppm TDS Calibration Solution" brand: "hm digital" price: "₪58" currency: ILS in_stock: true reviews_count: 8 url: https://www.desertcart.co.il/products/3671970-hm-digital-1000ppm-tds-calibration-solution store_origin: IL region: Israel --- # NIST-traceable lab-grade solution 88.7ml easy-pour HDPE bottle 1000ppm precise calibration HM Digital 1000ppm TDS Calibration Solution **Brand:** hm digital **Price:** ₪58 **Availability:** ✅ In Stock ## Summary > 🧪 Calibrate like a pro—because precision is the new power move. ## Quick Answers - **What is this?** HM Digital 1000ppm TDS Calibration Solution by hm digital - **How much does it cost?** ₪58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/3671970-hm-digital-1000ppm-tds-calibration-solution) ## 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 - • **Secure & Fresh:** Sealed with a coated foam liner to maintain solution integrity and longevity. - • **Precision Perfected:** Calibrate any TDS meter with 1000ppm NaCl solution for unmatched accuracy. - • **Lab-Grade Confidence:** NIST-traceable formula ensures your readings are scientifically reliable every time. - • **User-Friendly Design:** Wide-mouth HDPE bottle lets you dip your meter directly—no spills, no mess. - • **Universal Compatibility:** Works seamlessly with any brand of TDS or conductivity meter—no limits, no hassle. ## Overview The HM Digital 1000ppm TDS Calibration Solution is a premium, NIST-traceable NaCl solution designed to recalibrate any brand of TDS or conductivity meter. Packaged in a convenient 88.7ml wide-mouth HDPE bottle with a secure foam liner seal, it ensures accurate, reliable readings for professionals demanding laboratory-grade precision. ## Description For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. ## Features - For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges - NaCl calibration solution - Comes in lightweight HDPE plastic bottles - Laboratory quality NIST-traceable solutions - Any brand TDS meter can be calibrated to any brand of calibration solution - Bottles have a convenient wide mouth, allowing a user to simply insert the meter into a stable bottle - Sealed with coated foam liner ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | HM Digital, Inc. | | UPC | 891144000038 | | Global Trade Identification Number | 00891144000038 | | Part Number | C1000 | | Item Weight | 3.2 ounces | | Product Dimensions | 1.3 x 3.3 x 1.3 inches | | Item model number | 716170 | | Is Discontinued By Manufacturer | No | | Size | 1000ppm, 88.7ml Capacity | | Color | natural | | Item Package Quantity | 1 | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Brand:** HM Digital - **Item Weight:** 0.2 Pounds - **Item Volume:** 88.7 Milliliters - **Package Information:** Bottle - **Item Form:** Liquid ## Images ![HM Digital 1000ppm TDS Calibration Solution - Image 1](https://m.media-amazon.com/images/I/71yx1VepPfL.jpg) ## Questions & Answers **Q: What is the difference between the 342 ppm & 1000 ppm calibration solution? I'm not sure which one to buy for my TDS meter** A: If you are checking your water you should use the 342 ppm to calibrate as most city and well waters can run anywhere from 175-400.. If you are doing hydroponics and need to add juice (Nutz) to the water it is best to use 1000pmm cause you will be reading 800 - 2000 ppm. **Q: Does the 1000 ppm = 2mS/cm?** A: Believe so - the label says 2000 µs, guessing they mean 2000 µs/cm, so that'd be 2 ms/cm **Q: What TDS meter will the 1000 ppm calibration solution be compatible** A: its just a control substance. any meter that can measure TDS in the 1000ppm range will work with this. **Q: I’m very confused, i have a ubante tds meter and i stuck it in this 1000ppm solution and it reads exactly 500ppm. is my meter off exactly 500ppm?** A: You are correct, your meter is off exactly 500 ppm, below is a possible solution (calibrate your meter): 1) Check that the meter is set to the same salt/ionic solid as the calibration solution: (NaCl, rather than say KCl, MgCl2 or other setting allowed by the meter). 2) Before measuring greater than or equal to 0 ppm with a tds meter you will need to immerse the entire tip (containing two metal electrodes) into a first glass of distilled water (clean and dry and rinsed once with distilled water), found in a grocery store, to make sure the tip is clean. Insert the tds meter into a second glass (clean and dry and rinsed once with distilled water) of distilled water (other than that used to rinse the meter tip) and verify that the reading is 0 ppm. If the meter does not read 0ppm then refer to the tds meter manual to manually set the reading to 0 ppm. This is the first calibration point for the meter. 3) Once again, rinse the meter tip in the second glass of distilled water, then air dry the meter tip and then insert the meter tip into a portion (enough to immerse the meter tip and setting aside for future calibrations, based on the expiration date of the calibration solution) of the 1000 ppm solution poured into a third clean dry glass (that was rinsed with distilled water and then air dried). The reading should be close to 1000 ppm if the meter is calibrated correctly. 4) If the meter does not display 1000 ppm then refer to the tds meter instructions and read how to manually reset the reading on the meter to the calibration solution concentration value of 1000 ppm. This is the second calibration point. Now verify the meter functions as set by performing the following operations: 5) Once the meter is calibrated, rinse the meter tip in the second glass of distilled water in step 2), dispose of the water after removing the meter as the second glass is contaminated with 1000 ppm droplets, rinse with distilled water and refill with distilled water then immerse the meter tip into the second glass of distilled water and verify the reading is 0 ppm. 6) Rinse the meter tip in the second glass of distilled water, air dry the meter tip and, immerse the tip in the 1000 ppm solution and verify the reading is 1000 ppm. 7) To store the meter away, rinse the meter tip in distilled water and air dry. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Does What it is Designed to do if You Use it Correctly *by E***S on February 10, 2019* I use an EC meter to check the salinity level of nutrients for my indoor grow. This test liquid will check a meter for EC as well as PPM and it works well for that purpose. I prefer this over the packets you mix yourself because it's laboratory grade and made using pure RO water. So unless you have access to RO water, this it a better option then mixing your own.On that alone I can recommend this product for checking your meter's accuracy and recommend getting the 342 PPM solution as well, so you can test against a range. If you are interested in a little advice on using this product, read on.It does not take much to contaminate this liquid and throw off the accuracy. And yes, I realize the manufacturer states you can put the meter right into the wide mouth bottle, but IMO you take a chance on contaminating the test solution over time even if you rinse it in distilled water between uses. So you need to make sure you pour out what you need to test with, and not pour it back into the container. I use those small paper cups that you might use in a bathroom. They are inexpensive and good to have for calibration checking and also for holding samples of the water you are testing with your meter. If you use the same container all the time and don't rinse it well, it can build up salts in the form of solids that might raise the EC/PPM levels of the water you are testing.It's also a good idea to keep some distilled water around to rinse off your meter between uses and change that water often to avoid cross contamination. It may sound like overkill and a little paranoia on my part, but it really comes down to how accurate your readings need to be. In my case I want the readings to be be +/- maybe 2%. So if you take into account the accuracy of these meters, which is anywhere from a 2-5% deviation, having good calibration solution and a good process for keeping things uncontaminated ensures you are testing the meter without introduction a significant margin of error.As I mentioned this liquid will test for PPM levels as well as EC. I prefer using EC levels to measure salinity versus PPM which is just a mathematical equation (programmed into the meter) using EC, which is the base number. So measuring using EC is more accurate. Although for measuring drinking water levels and fish tank water, PPM is probably fine to use. Hope this helped some.The End ### ⭐⭐⭐⭐⭐ Must have calibration liquid if you own a TDS meter (and want it to work perfectly !!!!!) !!!!! *by R***Y on May 3, 2015* I had recently bought a TDS meter ( HM Digital TDS-3 Handheld TDS Meter With Carrying Case, http://www.amazon.com/gp/product/B000VTQM70/ref=cm_cr_ryp_prd_ttl_sol_11) for home use.This 1000ppm TDS calibration liquid is must for the meter. Although the meter description says it doesn’t require calibration but it is always good to calibrate it.It comes in a very sturdy plastic bottle, which is leak-proof.You always need at least two calibration points to correctly calibrate a metering/measuring device. Therefore, I also bought another calibration liquid (HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume: http://www.amazon.com/gp/product/B001VE99X8/ref=cm_cr_ryp_prd_ttl_sol_4).Many people have mentioned that you can make the calibration liquid at home by dissolving a known amount of sodium chloride in water. I would like to mention that its wont be a good idea. First, the water itself is not pure and you don’t know what is its PPM value. Second, and important, weighing 0.1 to 0.5 g at any weighing balance we have at home is impossible. SO spens some money and buy it. You wont regret it.I calibrated the mtere with bot solutions and then measured a few liquids f known ppm value and the reading I got were fairly accurate (within 5% of actual).!!!!!!! I STRONGLY ADVISE TO BUY THIS CALIBRATION LIQUID WHEN YOU BUY A TDS METER !!!!!! ### ⭐⭐⭐⭐ Leaking upon arrival *by A***Y on June 6, 2025* It was open and leaking when I got it. ## Frequently Bought Together - HM Digital 1000ppm TDS Calibration Solution - HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue - Apera Instruments AI1113 pH Calibration Buffer Solution Kit (7.00, 4.00), 8 oz. 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