Thermo Orion Star A122 Portable Conductivity Meter
Features
- Displays conductivity and TDS readings using Orion 8-pin mini-DIN electrodes
- AUTO-READ function alerts user and locks on-screen readings when stable
- IP67 waterproof rating, 3-year warranty
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Image | Part# | Product Description | Price | Stock | Order | |
---|---|---|---|---|---|---|
![]() | STARA1220 | Orion Star A122 Conductivity Portable Meter | $689.13 | Drop Ships From Manufacturer | ||
![]() | STARA1225 | Orion Star A122 Conductivity Portable Meter Kit | $1,272.24 | Drop Ships From Manufacturer |


Image | Part# | Product Description | Price | Stock | Order | |
---|---|---|---|---|---|---|
![]() | STARA-CS | Orion Star A-series portable hard field case | $158.10 | Drop Ships From Manufacturer | ||
![]() | 1210005 | Orion Star A-series portable soft field case | $165.54 | 1 Available | ||
![]() | STARA-AR | Orion Star A-series portable meter armor | $114.39 | Drop Ships From Manufacturer | ||
![]() | STARA-ESCD | Orion Star A-series conductivity and DO probe holder for use with armor | $31.90 | Drop Ships From Manufacturer | ||
![]() | 011050MD | Orion precise 2-electrode conductivity cell, MiniDIN connector, 1.5m cable | $537.54 | Drop Ships From Manufacturer | ||
![]() | 013016MD | Orion 2-electrode conductivity cell with glass flow cell, MiniDIN connector, 1.5m cable | $813.75 | Drop Ships From Manufacturer | ||
![]() | 013005MD | Orion DuraProbe 4-electrode conductivity cell, MiniDIN connector, 1.5m cable | $618.45 | Drop Ships From Manufacturer | ||
![]() | 1010003 | Orion universal power adapter for Star meters | $74.31 | Drop Ships From Manufacturer | ||
![]() | 011008 | Orion conductivity standard, 100 uS, (5) 60mL bottles | $117.18 | Drop Ships From Manufacturer | ||
![]() | 01100710 | Orion conductivity standard, 1413 uS/cm, (10) 15mL pouches | $48.55 | Drop Ships From Manufacturer | ||
![]() | 01100610 | Orion conductivity standard, 12,900 uS/cm, (10) 15mL pouches | $48.55 | Drop Ships From Manufacturer | ||
![]() | 911110 | Orion electrode rinse, (10) individual pouches | $38.87 | Drop Ships From Manufacturer | ||
![]() | 1010001 | Orion conductivity calibration resistor kit, MiniDIN connector | $542.19 | Drop Ships From Manufacturer |



The rugged, user-friendly meter displays conductivity, TDS and temperature readings on a large LCD screen, while icons provide quick updates on battery life, electrode status and calibration information. Simple button layout and on-screen messages simplify calibration and explain setup menu choices.
- AUTO-READ function to alert user and lock on-screen readings when stable
- Selectable cell constant
- Selectable reading reference temperatures of 20 C or 25 C to increase accuracy
- Non-volatile memory holds up to 50 data points
- Electrode arm and newly-designed probe holder to place probes into samples
- Universal power supply or battery power option
- IP67-rated housing (may be immersed for up to one hour with no water incursion)
- 3 year meter warranty
- Conductivity
- Range: 0.1 uS/cm to 200 mS/cm
- Resolution: Min 0.01 uS or 3 significant figures
- Relative Accuracy: 0.5% reading +/-1 digit
- Reference: 20, 25 C (default)
- Compensation: Linear (0.0 to 10.0 %/C)
- Compatible Cell Constants: 0.0001 to 10
- Number of Calibration Points: 1
- TDS
- Range: 1 to 19,999 mg/L
- Resolution: 4 significant figures
- Relative Accuracy: 0.5% reading +/-1 digit
- TDS Factor Range: Linear 0.01 to 10.00, default 0.49
- Temperature
- Range: -5 to 105 C
- Resolution: 0.1
- Relative Accuracy: +/-0.1 C
- Offset Calibration: Yes
- Datalogging
- Number of Points: 50
- Log Function: Manual, Automatic with AUTO-READ
- Log Edit: Delete last reading or all
- General
- Display: Custom LCD
- Inputs: 8-pin mini-DIN
- Power Adapter: Universal AC, 100-240 VAC
- Battery Power: 4 AAs, 2000 hrs life
- Environmental Requirements: 5 to 45 C and 5 to 85% relative humidity, non-condensing
- Regulatory and Safety: CE, TUV 3-1, FCC Class A
- IP Rating: IP67, splashproof and dustproof
- Warranty: 36 months (from date of purchase)
No, both meters feature the same accuracy for all measurements. They feature the same battery life and optional power supply as well. The main difference is the waterproof rating as the portable A122 meter has a higher rating of IP67.
In The News
Choosing The Right Thermo Portable For Your Project
With so many options in Thermo Scientific’s Orion Star A line, it can be difficult to narrow down which meter will best fulfill a project’s needs. One easy way to rule out some meters is by considering application type. For projects that rely largely on collecting samples in the field, a portable meter is clearly the way to go. But there’s still a handful of meters to choose from. 
 
To simplify making the right choice, we spoke with Ricki Hartwell, the global product manager for Thermo Scientific’s Orion Laboratory and Field Instruments. She recently shared her tips on choosing the right Thermo benchtop. Let’s take a look at her recommendations for selecting the right portable meter.
Read MoreWhat is Conductivity?
UPDATE : Fondriest Environmental is offering their expertise in conductivity through their new online knowledge base. This resource provides an updated and comprehensive look at conductivity and why it is important to water quality. To learn more, check out: Conductivity, Salinity and TDS. 
 
 
 Salinity and conductivity measure the water's ability to conduct electricity, which provides a measure of what is dissolved in water. In the SWMP data, a higher conductivity value indicates that there are more chemicals dissolved in the water. 
 
Conductivity measures the water's ability to conduct electricity. It is the opposite of resistance. Pure, distilled water is a poor conductor of electricity.
Read MoreProtecting Endangered Species: Conducting Mussel Surveys
*This is part two of a two-part story on endangered mussels. To read part one, click here * 
With over 300 endangered mussel species in the United States, environmental agencies like EnviroScience rise to the challenge of protecting these vital species. When new construction sites are determined, the Endangered Species Act steps in to protect any endangered wildlife within the impacted area. Unfortunately, the protocols surrounding these protections can be complex and difficult to understand, making the work of scientists like Greg Zimmerman, Corporate Vice President for EnviroScience and an endangered mussel surveyor, vital to protecting biodiversity.
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