Orion Star™ A121 pH Portable Meter
Advanced Sensors
Take simple, routine pH, mV and temperature measurements with the Thermo Scientific™ Orion™ Star A121 pH Portable Meter, an easy-to-use and budget-friendly instrument for basic pH analysis in the field. Perform up to a three point pH calibration with easy recall of calibration points and slope. Quickly navigate setup menus and ensure consistent calibrations using the simple keypad layout and on-screen text prompts. This waterproof meter has an IP67-rated housing for rugged protection in outdoor environments.
Description |
Orion Star A121 pH portable meter |
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Model |
Orion Star A121 pH/mV/RmV/Temperature Portable Meter |
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Item Description |
Orion Star A121 pH portable meter |
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Includes |
Star A121 pH meter, 4 AA batteries, literature CD, printed quick start guide and meter test certificate |
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Range (pH) |
2.00 to 16.00pH |
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Resolution (pH) |
0.1, 0.01pH |
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Accuracy (pH) |
±0.01pH |
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Range (mV) |
±1600.0mV |
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Range (Relative mV) |
±1999.9mV |
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Resolution (mV) |
0.1mV |
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Accuracy (mV) |
±0.2 mV or ±0.05% of reading whichever is greater |
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Calibration |
pH, relative mV (RmV) and temperature |
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Calibration Points (pH) |
1 to 3 |
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Calibration Points |
1 point relative mV (RmV) mode |
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Isopotential Point |
7.00pH |
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Range (Temperature) |
5.0° to 105.0° C, 22.0° to 221.0° F |
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Resolution (Temperature) |
0.1°C, 0.1°F |
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Accuracy (Temperature) |
±0.1°C |
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Temperature Selection |
Manual or automatic with ATC temperature probe |
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Temperature Probe Calibration |
1 point temperature offset calibration |
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Channels |
1 |
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Display Type |
LCD |
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Keypad |
Simple with highlighted measure key, scroll and shortcut keys |
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Measurement Modes |
pH, mV or relative mV (RmV) with temperature |
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Stability |
Smart Stability and Smart Averaging |
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Data Management Details |
Internal data point memory |
| Data Points | 50 |
| Log Function Type | Automatic data logging with AutoRead measure mode; manual data logging with Continuous measure mode |
| Memory |
Nonvolatile memory preserves log and settings |
| Languages | English |
| Inputs |
BNC (pH or ORP electrode), 8 pin MiniDIN (ATC temperature probe) |
| Outputs | None |
| Probe Type | pH electrode, ORP electrode, ATC temperature probe (purchase separately) |
| Power Supply | 4 AA batteries (included) or universal AC adapter (sold separately) |
| AC Adapter |
Universal 5060 Hz, 100240 VAC power adapter (sold separately, Cat. No. 1010003) |
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Battery Life |
2000 hours |
| Battery Type | Four AA (included) |
| IP Rating | IP67 |
| Certifications/Compliance | Certifications/Compliance |
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Temperature (English) Operating |
41° to 113°F (ambient) |
| Temperature (Metric) Operating | 5° to 45° C (ambient) |
| Relative Humidity Range | 5 to 85 %, noncondensing |
| Dimensions (L x W x H) | 24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.) |
| Weight (English) | 2 lb. |
| Weight (Metric) | 0.5kg |
| Warranty | 3 year meter warranty |
- Measure pH, mV or relative mV with temperature
- Perform up to a three point pH calibration with automatic buffer recognition or manual buffer entry
- Simplified, easy-to-read display shows main measurement with temperature, stability indicator and electrode condition icon
- User-friendly operation with basic calibration text prompts
- Easily recall calibration data for procedure checks
- Non-volatile memory preserves 50 point internal data log and meter settings, even with loss of power
- Flexible power options with AA batteries or optional universal power adapter
- IP67-rated housing is waterproof for rugged field operation
- Meter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter stand
- Meters offer CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty