--- product_id: 32505340 title: "Conductivity Standard 2-Pack — 250 mL (8.4 fl oz) Each: 100 μS and 1413 μS — NIST Traceable — for 2-Point Calibration" brand: "biopharm" price: "£24.00" currency: GBP in_stock: true reviews_count: 8 category: "Biopharm" url: https://www.desertcart.co.uk/products/32505340-conductivity-standard-2-pack-250-ml-8-4-fl-oz store_origin: GB region: United Kingdom --- # TDS cross-reference values included 2-point calibration precision NIST traceable accuracy Conductivity Standard 2-Pack — 250 mL (8.4 fl oz) Each: 100 μS and 1413 μS — NIST Traceable — for 2-Point Calibration **Brand:** biopharm **Price:** £24.00 **Availability:** ✅ In Stock ## Summary > 📏 Calibrate like a pro — precision you can trust, results you can flaunt! ## Quick Answers - **What is this?** Conductivity Standard 2-Pack — 250 mL (8.4 fl oz) Each: 100 μS and 1413 μS — NIST Traceable — for 2-Point Calibration by biopharm - **How much does it cost?** £24.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/32505340-conductivity-standard-2-pack-250-ml-8-4-fl-oz) ## Best For - biopharm enthusiasts ## Why This Product - Trusted biopharm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Optimized Shelf Life:** Use within 1 year of manufacture to ensure peak calibration performance every time. - • **Free Analytical Tools:** Certificate of Analysis plus temperature vs conductivity tables included—no extra cost. - • **NIST Traceable Confidence:** Calibrated against gold-standard potassium chloride references for lab-grade accuracy. - • **Instant TDS Cross-Reference:** Includes TDS values for NaCl and natural water curves to bridge traditional and modern testing. - • **Dual-Standard Calibration Pack:** Cover your measurement range with 100 μS & 1413 μS for unmatched linearity verification. ## Overview This 2-pack of 250 mL conductivity standards offers precise 2-point calibration with 100 μS and 1413 μS solutions, fully NIST traceable for laboratory-grade accuracy. Designed for professionals demanding reliable linearity checks, it includes TDS cross-reference values and complimentary certificates and tables, ensuring your conductivity meter delivers consistent, trustworthy readings. Ideal for water testing, hydroponics, and aquaculture, it guarantees confidence in every measurement with a 1-year shelf life. ## Description Don't assume that your conductivity meter is working correctly. Probes can get dirty, worn and damaged. Give yourself that feeling of confidence that comes from doing things the right way. We suggest you use 2 calibration standards to cover a range that you normally work within to verify the linearity of the instrument. A different correction factor may be required for high EC values compared to low EC values. If your meter is essentially linear over the entire calibration range you can feel confident in your measurement results. TDS is an old terminology still used today in some water testing applications. It attempts to correlate Total Dissolved Solids (TDS) with conductivity. But because the conductivity depends upon exactly which "solids" are dissolved it can vary widely with different situations. Biopharm conductivity standards are calibrated using NIST traceable potassium chloride conductivity reference standards and are shown as uS/cm at 25 C. We may include a "TDS" cross reference value for those meters that have TDS scales but we want you to understand the limitations of this terminology. Some of our standards cross-reference TDS values for ppm NaCl and also TDS from the "442" natural water curve which are more likely to fit readings used in water testing, hydroponic and aquaculture applications. We suggest you use EC (electrical conductivity) whose readings are usually microSiemens per centimeter or microMho per centimeter (uS/cm or uMho/cm). Review: Buen producto recompense. - Excelente calidad y tiempo de entrega excelente. Review: It is useful for quickly calibrations - It is useful for quickly calibrations. I used it to be sure if my new HANNA conductivity meter was well calibrated. It was very important to take the decision for to chance the membranes in a reverse osmosis in a water treatment plant. Excellent product. Good and cheap. ## Features - Convenient 2-pack Enables Linearity Calibration - Accurate NIST Traceable Standards - TDS Cross Reference Values Included - FREE Certificate of Analysis and Temperature vs Conductivity Tables - Expires 1 Year After Date of Manufacture ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01F2OZY4U | | Best Sellers Rank | #263,074 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #79 in Chemical Standards | | Boiling Point | 100 Degrees Celsius | | Boiling point | 100 Degrees Celsius | | Brand | Biopharm | | Brand Name | Biopharm | | Container Type | Bottle | | Customer Reviews | 4.6 out of 5 stars 59 Reviews | | Item Form | Liquid | | Item Volume | 250 Milliliters | | Manufacturer | Biopharm Inc | | Package Information | Bottle | | Part Number | BC8214X | | UPC | 721272377125 | | Volume | 250 Milliliters | ## Product Details - **Brand:** Biopharm - **Item Form:** Liquid - **Item Volume:** 250 Milliliters - **Manufacturer:** Biopharm Inc - **Package Information:** Bottle ## Images ![Conductivity Standard 2-Pack — 250 mL (8.4 fl oz) Each: 100 μS and 1413 μS — NIST Traceable — for 2-Point Calibration - Image 1](https://m.media-amazon.com/images/I/81hSQ3j6U3L.jpg) ## Questions & Answers **Q: Will this work for calibrating a hanna pwt meter?** A: Yes this is exactly what you use to calibrate and test that water conductivity meter. I have been using BioPharm's standards for a few years now in our lab and i am really pleased with their accuracy. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Buen producto recompense. *by J***O on May 11, 2026* Excelente calidad y tiempo de entrega excelente. ### ⭐⭐⭐⭐⭐ It is useful for quickly calibrations *by F***L on April 27, 2018* It is useful for quickly calibrations. I used it to be sure if my new HANNA conductivity meter was well calibrated. It was very important to take the decision for to chance the membranes in a reverse osmosis in a water treatment plant. Excellent product. Good and cheap. ### ⭐⭐⭐⭐⭐ Buen producto *by J***E on December 14, 2021* Producto excelente calidad se corresponde con la descripción ## Frequently Bought Together - Conductivity Standard 2-Pack — 250 mL (8.4 fl oz) Each: 100 μS and 1413 μS — NIST Traceable — for 2-Point Calibration - pH Buffer Calibration Solution Kit 3-Pack: pH 4.00, pH 7.00, pH 10.00 Buffers — 250 ml (8.4 fl oz) Each — Color Coded — NIST Traceable for All pH Meters - Extech EC500 Waterproof ExStik II pH/Conductivity Meter --- ## 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.co.uk/products/32505340-conductivity-standard-2-pack-250-ml-8-4-fl-oz](https://www.desertcart.co.uk/products/32505340-conductivity-standard-2-pack-250-ml-8-4-fl-oz) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-30*