Top TDS Meter Brands for Accurate Water Testing

A Total Dissolved Solids (TDS) meter is an essential tool for anyone who wishes to monitor the quality of water, be it for home use, gardening, or industrial purposes. With numerous brands in the market, choosing the right TDS meter can be a daunting task. From premium options to budget-friendly choices, there are several brands that stand out for their accuracy, durability, and ease of use. To help you make an informed decision, we have compiled a list of the best TDS meter brands below.

Illustration of tds meter

Best brands of tds meter in 2025

HM Digital

HM Digital is renowned as one of the leading producers of TDS meters, known for their high-quality and versatile products. The COM-100, a flagship model, is a professional-grade EC/TDS/Temp meter ideal for various applications including water quality testing, hydroponics, and water purification. This meter boasts advanced features such as automatic temperature compensation, digital calibration, and a waterproof IP-67 rating. HM Digital's products are part of a market expected to grow at a CAGR of 5.9% from 2022 to 2032, with the global TDS meter market projected to reach $3.35 billion by 2032. The brand's commitment to innovation and user-friendly designs has made their TDS meters a preferred choice across multiple industries.

Apera Instruments

Apera Instruments is a leading brand in the TDS meters market, known for its reliable and accurate products. The TDS20 Value Pocket TDS Tester, for example, offers a range of 0 to 1000 ppm, a resolution of 0.1/1 ppm, and an accuracy of ±1% F.S, making it ideal for various applications including tap water, agriculture, and education. Apera Instruments is part of a market expected to grow at a CAGR of 5.5% from 2022 to 2030. The company's focus on auto temperature compensation and stable reading indications enhances user experience. Apera's products are widely recognized for their durability and ease of use.

Bluelab

Bluelab is renowned as one of the best producers of TDS meters, trusted by growers for over 25 years with over 100,000 products in use. Their meters, such as the Bluelab Commercial Truncheon Nutrient Meter and the Bluelab Combo Meter, offer robust and reliable construction, automatic temperature compensation, and the ability to measure up to 6.0 EC, 60 CF, 3000 PPM 500, and 4200 PPM 700. These devices are fully waterproof, ensuring durability in various growing environments. Bluelab's products are designed with growers in mind, providing easy-to-use designs and customizable measurement units. They are backed by industry-leading warranties, such as a 5-year warranty for the Bluelab Combo Meter.

Thermo Fisher Scientific

Thermo Fisher Scientific is a leading producer of TDS meters, known for its high-performance and reliable products. The company's Orion Conductivity Meters, such as the Orion Versa Star Pro and Orion Star A212, offer advanced features like temperature compensation and data logging, making them ideal for applications in the pharmaceuticals, biotechnology, and food and beverage industries. Thermo Fisher Scientific holds a significant market share, with a revenue of $42.37 billion and a market share of 3.55% in the scientific and technical instruments sector as of Q3 2024. Their products are characterized by a wide conductivity range of 0.001 uS to 3000 mS and up to 500 data logs with time and date stamps. This expertise and market presence solidify Thermo Fisher Scientific's position as a top choice for TDS meters.

Oakton Instruments

Oakton Instruments is a leading brand in the production of high-quality TDS meters, known for their accuracy and user-friendly design. The company's products, such as the Oakton meter line, include a range of handheld and multiparameter meters that cater to various applications, including environmental monitoring, food and beverage, and pharmaceuticals. Oakton Instruments is part of a competitive market that is expected to grow at a CAGR of approximately 5.5% from 2024 to 2033, with the global TDS meters market valued at USD 320 million in 2023 and projected to reach USD 540 million by 2033. Their commitment to innovation and customer satisfaction positions them well in the market, especially in regions like Asia-Pacific where rapid industrialization and urbanization drive demand for TDS meters. Oakton's products are recognized for their reliability and advanced features, making them a preferred choice among professionals.

Hanna Instruments

Hanna Instruments is a leading producer of TDS meters, known for its innovative and accurate measurement solutions. The company utilizes advanced features such as exposed temperature probes for near-instantaneous measurements and adjustable EC to TDS conversion factors, enhancing the reliability of its products. Hanna Instruments is a key player in the global TDS meter market, which is expected to grow at a CAGR of 5.9% from 2022 to 2032, with the market projected to reach a valuation of US$ 3.35 billion by 2032. The company's products are widely used in various sectors, including pharmaceuticals, environmental monitoring, and research laboratories. Hanna Instruments' commitment to product innovation and technological advancements has solidified its position in the competitive TDS meter market.

Milwaukee Instruments

Milwaukee Instruments is a leading manufacturer in the TDS meters market, known for its high-accuracy and user-friendly products. The Milwaukee EC40 EC/TDS Nutrient Meter, for example, is designed for hydroponics, horticulture, and agriculture, offering automatic temperature compensation and a wide measurement range from 0.2 to 4 mS/cm. This meter is factory calibrated, eliminating the need for continuous calibration, and features a long battery life of up to 3 years with approximately 10 measurements per day. Milwaukee Instruments is part of a competitive landscape that includes other major players like OMEGA Engineering, Hanna Instruments, and Hach, contributing to the market's growth and industry potential. The company's products are highly regarded for their reliability and precision.

VST

VST is renowned as one of the top producers of TDS meters, particularly in the coffee industry, with its refractometers offering high accuracy and repeatability comparable to laboratory apparatus. Early iterations of VST refractometers were produced by Atago, a company with over 70 years of experience in refractometer technology, before VST switched to Reichert Technologies hardware. VST's current models, such as those based on the Misco Palm Abbe, feature custom-loaded software for direct TDS measurement of coffee and espresso. These refractometers have shown minimal variability in readings, with a standard deviation of 0.04 in some studies. This precision makes VST refractometers a reliable choice for coffee solute concentration assessment. To learn more about the precision of these instruments, explore this refractometer comparison study.

Extech

Extech is a leading brand in the laboratory TDS meters market, known for its innovative and reliable measurement solutions. The Extech EC400 ExStik(r) Conductivity/TDS/Salinity Meter, for example, features advanced microprocessor chip technology and patented sensor technology, allowing for simultaneous measurement of conductivity, TDS, salinity, and temperature. This product is part of a market that is anticipated to grow at a CAGR of approximately 5.5% from 2024 to 2033, with the laboratory TDS meters market valued at USD 320 million in 2023 and expected to reach USD 540 million by 2033. Extech's products are favored for their accuracy, ease of use, and technological advancements, making them a key player in the competitive landscape of the TDS meter market. The brand's focus on product innovation and customer satisfaction has contributed significantly to its market presence.

Dr. meter

Dr. Meter is renowned as one of the top producers of TDS meters, known for their high accuracy and user-friendly designs. The brand has seen significant growth, particularly in the hydroponics and pharmaceutical sectors, where precise measurement of total dissolved solids is crucial. With a market expected to grow at a CAGR of 5.9% from 2022 to 2032, Dr. Meter's products are in high demand, especially in regions like Asia-Pacific, which is anticipated to be a key growth area. Their TDS meters are valued for their reliability and compliance with stringent water quality standards, making them a favorite among both professionals and consumers. The brand's commitment to technological advancements and customer satisfaction has solidified its position in the market.