Starter Pen Meters
Compact Design for Fast, Convenient Electrochemistry Measurement At Your Fingertips


Meter Type TDS
Measurement Range 0.0 – 1000 mg/L
Accuracy ± 10mm
Item Number: 30073979
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement without restriction.
pH, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), salinity, total dissolved solids (TDS), temperature measurement
Liquid crystal display (LCD) display with secondary information line (on select models)
4 1.5V batteries (included)
ABS Housing
Design Features
Easily replaceable electrodes, automatic shut off feature
Meter Type TDS
Measurement Range 0.0 – 1000 mg/L
Accuracy ± 10mm
Measurement Resolution 1 mg/L
Display LCD
ATC Not Applicable
Temperature compensation Not Applicable
Automatic Shutdown Yes, After 6 minutes of non-use
Battery Life 200 Hours with Disposable Batteries
Calibration NA
Conductivity accuracy (±) 2.5 %
Conductivity measuring range 0 – 1000 mg/L
Dimensions 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW)
Net Weight 3.88 oz (110 g)
Number of Buttons 1
Power 4 AG13 Batteries (Included)
Protection Rating IP67
Temperature Display Not Applicable
Working Environment 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing)
Wrist Strap Yes

Item Number



Pen Electrode, ST10C-B ST10T-B