Starter pen meters provide what should be expected of a small, economical pen meter: simple, fast, straightforward, no-frills operation time and time again. With durable ABS housing, a protective sensor cap, and automatic shutdown feature that preserves battery life, Starter pen meters can endure consistent use in rugged environments.
Equipped with a wrist strap that prevents unintentional dropping, Starter pen meters are feature an IP67 waterproof design that can prevent water damage when dropped in to liquid. 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.
Small but Productive Conductivity MetersStarter 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 | ST20C-B | ST20C-A | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 |
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| Size/Weight | 185 x 45 x 38 mm 110g |
185 x 45 x 38 mm 110g |
185 x 45 x 38 mm 110g |
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| Model | ST10C-C | ST10C-B | ST10C-A | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 |
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| Model | ST10 30073970 |
ST10C-A 30073972 |
ST10C-B 30073973 |
ST10C-C 30073974 |
ST10R 30073984 |
ST10S 30073982 |
ST10T-A 30073978 |
ST10T-B 30073979 |
|---|---|---|---|---|---|---|---|---|
| Meter Type | pH | Conductivity | Conductivity | Conductivity | ORP | Salinity | TDS | TDS |
| Measurement Range | 0.00 – 14 pH | 0.00 – 199.9 µs/cm | 0 – 1999 µs/cm | 0.00 – 19.99 ms/cm | -1000 – 1000 mV | 0.0 – 10.0 ppt | 0.0 – 100.0 mg/L | 0.0 – 1000 mg/L |
| Accuracy | ±0.1 pH | ±2.5% FS | ±2.5% FS | ±2.5% FS | 2mV | ±2.5% FS | ±2.5% FS | ± 10mm |
| Measurement Resolution | 0.1 pH | 0.1 µs/cm | 1 µs/cm | 10 µs/cm | 1 mV | 0.1 ppt | 0.1 mg/L | 1 mg/L |
| Display | LCD | LCD | LCD | LCD | LCD | LCD | LCD | LCD |
| ATC | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Temperature compensation | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Automatic Shutdown | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use | Yes, After 6 minutes of non-use |
| Battery Life | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries | 200 Hours with Disposable Batteries |
| Calibration | NA | NA | NA | NA | NA | NA | NA | NA |
| Conductivity accuracy (±) | - | 2.5 % | 2.5 % | 2.5 % | - | 2.5 % | 2.5 % | 2.5 % |
| Conductivity measuring range | - | 0.0 – 199.9 µS/cm | 0 – 1999 µS/cm | 0.00 – 19.99 mS/cm | - | 0.0 – 10.0 ppt | 0.0 – 100.0 mg/L | 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) | 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) | 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) | 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) | 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) | 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) | 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) | 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) | 3.88 oz (110 g) | 3.88 oz (110 g) | 3.88 oz (110 g) | 3.88 oz (110 g) | 3.88 oz (110 g) | 3.88 oz (110 g) | 3.88 oz (110 g) |
| Number of Buttons | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| pH accuracy (±) | 0.1 | - | - | - | - | - | - | - |
| pH measuring range | 0 – 14 | - | - | - | - | - | - | - |
| Power | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) | 4 AG13 Batteries (Included) |
| Protection Rating | IP67 | IP67 | IP67 | IP67 | IP67 | IP67 | IP67 | IP67 |
| Temperature Display | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Working Environment | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) |
| Wrist Strap | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |