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.
Convenient Results at Your Fingertips
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
Standard Features Include:
Simple Operation in a Slim and Portable Design Starter pen meters provide what should be expected of a small pen meter. Simple, fast, straightforward, no-frills yet highly accurate operation time and time again.
Durably Constructed to Withstand Wear and Tear Resulting from Repetitive Use With durable plastic housing, a protective cap that safeguards the sensor, and an automatic shutdown feature to preserve battery life, the Starter pen meters can endure consistent use in rugged environments.
Waterproof Housing Protects the Meters in their Working Environment Equipped with a wrist strap that helps to prevent unintentional dropping, Starter pen meters are constructed with an IP67 waterproof design that can prevent water damage when accidentally dropped into liquid.
pH Testing
Two models with varying resolution and accuracy; the ST10 and ST20 offer a convenient way to measure pH, or the relative acidity or alkalinity of a sample at a given temperature. The pH pen meters can be operated with just one hand, freeing up your other hand to handle samples
Model
ST20
ST10
Price
$111.00
$65.25
Range
0.00 - 14.00
0.0 - 14.0
Resolution
0.01 pH
0.1 pH
Accuracy
0.05 pH
0.1 pH
Temperature Range
0.0-99°C
N/A
Temperature Compensation
Yes
N/A
Display
Dual
Single
Calibration
3 Point
N/A
Buffer Group
4.01 7.00 10.01
N/A
Automatic Shutdown
6 Minutes of Non-Use
6 Minutes of Non-Use
Battery
4 AG13 1.5V Micro Alkaline Batteries
4 AG13 1.5V Micro Alkaline Batteries
Size/Weight
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
Portable ORP Measurement
ST10R and ST20R can provide measurement of ORP virtually anywhere the need for measurement of the availability of electrons in a liquid exist. Both models provide almost instantaneous results and the ST20R offers the ability to hold the reading right on the display to provide additional time for data logging.
Model
ST20R
ST10R
Price
$173.60
$139.50
Range
-1000mV - 1000mV
-1000mV - 1000mV
Resolution
1mV
1mV
Accuracy
2mV
2mV
Temperature Range
0.0 - 99.0°C
N/A
Temperature Compensation
Yes
N/A
Display
Dual
Single
Calibration
N/A
N/A
Automatic Shutdown
6 Minutes of Non-Use
6 Minutes of Non-Use
Battery
4 AG13 1.5V Micro Alkaline Batteries
4 AG13 1.5V Micro Alkaline Batteries
Size/Weight
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
Productive Conductivity Meters
Starter pen meters are the choice for basic testing needs of the total ionic concentration within a solution. With six models that can measure within three different conductivity ranges, there is a Starter conductivity meter for every application that requires portable operation and quick results.
Model
ST20C-C 30073977
ST20C-B 30073976
ST20C-A 30073975
Price
$124.50
$124.50
$124.50
Range
0.00 - 19.99 ms/cm
0 - 1999 µs/cm
0.0 - 199.9 µs/cm
Resolution
10 µs/cm
1 µs/cm
0.1 µs/cm
Accuracy
± 1.5% FS
± 1.5% FS
± 1.5% FS
ATC
With Temperature Display
With Temperature Display
With Temperature Display
Display
Dual
Dual
Dual
Automatic Shutdown
6 minutes of Non-Use
6 minutes of Non-Use
6 minutes of Non-Use
Battery
4 AG13 1.5V Micro Akaline Battery
4 AG13 1.5V Micro Akaline Battery
4 AG13 1.5V Micro Akaline Battery
Size/Weight
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
Model
ST10C-C 30073974
ST10C-B 30073973
ST10C-A 30073972
Price
$85.50
$85.50
$85.50
Range
0.00 - 19.99 ms/cm
0 - 1999 µs/cm
0.0 - 199.9 µs/cm
Resolution
10 µs/cm
1 µs/cm
0.1 µs/cm
Accuracy
± 2.5% FS
± 2.5% FS
± 2.5% FS
ATC
Without Temperature Display
Without Temperature Display
Without Temperature Display
Display
Single
Single
Single
Automatic Shutdown
6 minutes of Non-Use
6 minutes of Non-Use
6 minutes of Non-Use
Battery
4 AG13 1.5V Micro Akaline Battery
4 AG13 1.5V Micro Akaline Battery
4 AG13 1.5V Micro Akaline Battery
Size/Weight
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
Simple Salinity Measurement
Starter pen meters combine all of the most useful features for measuring salinity in a liquid medium. With the combination of quality construction and sturdy design, Starter pen meters will provide durable operation in even the toughest environments.
Meters
ST20S 30073983
ST10S 30073982
Price
$124.50
$85.50
Range
0.0 - 80.0 ppt
0.0 - 10.0 ppt
Resolution
0.1 ppt
0.1 ppt
Accuracy
±1.5% FS
±2.5% FS
ATC
With Temperature Display
Without Temperature Display
Display
Dual
Single
Automatic Shutdown
6 Minutes of Non-Use
6 Minutes of Non-Use
Battery
4 AG13 1.5V Micro Alkaline Batteries
4 AG13 1.5V Micro Alkaline Batteries
Size/Weight
185 x 45 x 38 mm 110g
185 x 45 x 38 mm 110g
Multi Parameter Meter
The OHAUS ST20M is a multi parameter pen meter that directly measures pH, conductivity and temperature, as well as provides conversion measurements for TDS and Salinity. These fully waterproof pen meters combine measurement capabilities of two testers in one convenient pocket-sized unit.
Great for water, laboratory or plant use, the ST20M features a singlejunction pH electrode and a pin-style conductivity probe for longer usage and durability. The replaceable electrode module saves you money by reusing the meter body. Advanced features include auto-shutoff, lowbattery indicator, and simple and easy calibration
Measures 5 parameters including pH, Conductivity, TDS,
Salinity, and Temperature
Waterproof rated to IP67
Automatic Temperature Compensation
Auto shutoff with low battery indicator
ST20M meter includes electrode, protective sensor cap, four AG13 1.5V batteries, and wrist strap.
Meters
ST20M-B 30393199
ST20M-C 30393200
Price
Selected
$141.75
$141.75
Measurement Range
pH
0 - 14
Conductivity
0 … 1999 µS/cm
0 … 19.99 mS/cm
TDS
0 … 1000 mg/L
N/A
Salinity
N/A
0.0–10.0 ppt
Temperature
0 - 99.0 °C
Resolution
pH
0.01 pH
Conductivity
1µS/cm
0.01 mS/cm
TDS
1 mg/L
NA
Salinity
N/A
0.1 ppt
Temperature
0.1 °C
Accuracy
pH
± 0.05 pH
Conductivity
± 2 % Full Scale
TDS
± 2 % Full Scale
N/A
Salinity
N/A
± 2 % Full Scale
Temperature
± 0.5 °C
ATC
Yes, with temperature display
ATC Range
0 - 45 °C
Calibration
pH
3 point
Conductivity
1 point
TDS
N/A
Salinity
N/A
IP Grade
IP67
Dimensions
185 × 45 × 38 mm
Weight
110 g
Batteries
4 × 1.5V
Battery Life
100 hours
Warranty
1 year
Simple and Fast Dissolved Oxygen (DO) Measurement
The perfect DO meter for every application that requires portable operation and quick results. With IP67 waterproof design and automatic shutdown feature that preserves battery life, the Starter DO meter can endure consistent use in rugged environments.
Meters
ST20D 30073986
Price
$374.40
Measurement Range
0.0 – 19.9 mg/L
Resolution
0.1 mg/L
Accuracy
± 0.5 mg/L
Batteries
4 AG13 1.5V Micro Alkaline
Dimension
185 × 42 × 37 mm
Weight
90 g
Auto-off
After 15 Minutes of Inactivity
Auto Temperature Compensation Range
5 to 45 °C (41 to 113 °F
Materials
ABS
Complete TDS Meters
When you need reliable and accurate measurement of TDS, the Starter pen meter offer a great value in a portable and compact design. Bring the Starter TDS Meter wherever your need to measure the combined content of all organic and inorganic substances in a liquid takes you.
