Ohaus model ST20 Pen Ph

Item: 3842B PH METER


All products ship from our 30,000 sq. ft. Haverhill, MA warehouse

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Call 978-521-2221
to request information & pricing for item 3842B PH METER

90-Day Warranty

American Instrument Exchange
Contact us for all your used lab equipment needs

1023 Western Ave.
Haverhill, MA 01832

Phone: 978-521-2221
Fax: 978-521-8822

Email: info@americaninstrument.com

Shipping Policy

Ohaus pH Meter – Model ST20

  • 0.00 – 14 pH range
  • ±0.1 pH accuracy
  • 0.0 – 99.0°C range
  • 90-day warranty

Ohaus pen meters provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity and total dissolved solids (TDS), and dissolved oxygen (DO). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement with no restriction. Each meter offers simple operation in a slim & portable design providing fast, straight-forward results time and time again. Durably constructed to withstand wear and tear, Ohaus pen meters provide a sturdy plastic, waterproof housing, protective safety cap, integrated wrist strap and auto shutdown feature to preserve battery life.

Probes not available through American Instrument Exchange. Please contact the manufacturer for questions about probe and other accessories.

Our technicians test all equipment to confirm that it operates properly and to the manufacturer’s specifications. While we can’t test for a specific analytical application, we will do our best to simulate the conditions under which the equipment will be run. If you have particular testing requirements or requests, please let us know and we’ll work with you to make sure these requirements are addressed during testing.

The photos above are representative. Please bear in mind that the equipment shown is currently in storage in our warehouse and that in addition to testing each machine we will clean all the equipment thoroughly prior to shipment. We often have multiple units of each model in stock and sometimes we're unable to feature photos of every single unit. At your request, we can provide photos of the equipment in your order after it has been tested and cleaned.

Ohaus pH Meter – Model ST20 - Specifications

Unit dimensions 1.5” x 1.77” x 7.28”
Measurement range 0.00 – 14 pH
Accuracy ±0.05 pH / ±0.05ºC
Measurement resolution 0.01 pH
Automatic shutdown After 6 minutes of non-use
Power 4 AG13 batteries (included) good for 200 hours of use


For inquiries about the Ohaus pH Meter, please give us a call at 978-521-2221, or fill out the form on this page.