Ohaus ST20M Series Pen Meter

Measurement Range: 0.0 – 99.0 °C; 0.00 – 14 pH; 0.00 – 19.99 ms/cm; 0.0 – 10.0 ppt

• Measures 5 parameters including pH, Conductivity, TDS, Salinity, and Temperature
• Waterproof rated to IP67
• Automatic Temperature Compensation
• Auto shutoff with low battery indicator

For over a century, OHAUS has perfected the art of measurement through our line of weighing products. Taking a similar approach to our weighing equipment, OHAUS now delivers a line of pen meters that are durable, practical and affordable. Starter pen meters—the portable solution for on-the-go measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, total dissolved solids (TDS) and dissolved oxygen (DO). Starter pen meters are the economical option when you are simply looking for accurate measurements with no restrictions.

Convenient pH Testing

Two models with varying resolution and accuracy; theST10 and ST20 offer a convenient way to measure pH,or the relative acidity or alkalinity of a sample at a giventemperature. The pH pen meters can be operated with justone hand, freeing up your other hand to handle samples.

Portable ORP Measurement

ST10R and ST20R can provide measurement of ORP virtuallyanywhere the need for measurement of the availabilityof electrons in a liquid exist. Both models provide almostinstantaneous results and the ST20R offers the ability to holdthe reading right on the display to provide additional time fordata logging.

Productive Conductivity Meters

Starter pen meters are the choice for basic testing needs of the total ionicconcentration within a solution. With six models that can measure withinthree different conductivity ranges, there is a Starter conductivity meter forevery application that requires portable operation and quick results.

Simple Salinity Measurement

Starter pen meters combine all of the most useful features for measuringsalinity in a liquid medium. With the combination of quality construction andsturdy design, Starter pen meters will provide durable operation in even thetoughest environments.

Multi Parameter Meter

The OHAUS ST20M is a multi parameter pen meter that directlymeasures pH, conductivity and temperature, as well as providesconversion measurements for TDS and Salinity. These fully waterproofpen meters combine measurement capabilities of two testers in oneconvenient pocket-sized unit.

Great for water, laboratory or plant use, the ST20M features a singlejunction pH electrode and a pin-style conductivity probe for longerusage and durability. The replaceable electrode module saves youmoney by reusing the meter body. Advanced features include autoshutoff, low-battery indicator, and simple and easy calibration.