Conductivity Meters

Benchtop or portable instruments and probes used to measure temperature and electrical conductivity of water or solutions; used in hydroponics, aquaculture, aquaponics, and freshwater systems to monitor quantities of nutrients, salts, or impurities.

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Thermo Scientific™ Orion Star™ A322 Conductivity Portable Meter

Accurately monitor conductivity, TDS, salinity, resistivity and temperature with this conductivity portable meter designed for challenging field tests.

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Specifications

Salinity Measurement Modes	Practical salinity (psu) or natural sea water (ppt)
Range (Resistivity)	2 ohm to 100.0 megohm
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Languages	English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Measurement Modes	Conductivity,TDS,Salinity,Resistivity with Temperature
Power Supply	4 AA batteries (included) or universal AC adapter (sold separately)
Battery Life	800 hr.
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	Graphic LCD with Backlight
Data Points	5000 with date and time stamp
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Stability	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Resolution (Conductivity)	0.001 μS minimum, auto ranging up to 4 significant digits
Range (Conductivity)	0.001 μS/cm to 3000 mS/cm
Log Function Type	Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
Battery Type	4 x AA (included)
Relative Humidity Range	5 to 85%, non-condensing
Dimensions (L x W x H)	24 x 10 x 6.5 cm (9.5 x 3.9 x 2.6 in.)
Accuracy (TDS)	0.5% of reading ±1 digit
Temperature Selection	Manual or automatic with ATC temperature probe
Keypad	Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB, RS232
Backlight Option	Yes, selectable
Compatible Probes	2-cell or 4-cell conductivity sensors with built-in temperature
Methods	10 per channel with password protection
Cell Constant	0.001 to 199.9cm-1
Temperature (Metric) Reference	5, 10, 15, 20, 25°C
Channels	1
TDS Factor Range	Linear (0.02 to 9.99)
Range (Salinity)	0.06 to 80.00 psu, 0.05 to 42.00 ppt
Temperature Compensation	Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off wit
Accuracy (Salinity)	0.5% of reading ±1 digit
Resolution (Salinity)	0.01 psu or 0.01 ppt minimum, auto ranging
Accuracy (Conductivity)	0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Inputs	8 pin MiniDIN (conductivity sensor with built-in temperature)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	0.5 kg
Calibration Points (Conductivity)	5
Temperature (English) Operating	41°F to 113°F (ambient)
Resolution (Resistivity)	1 ohm or 0.1 megohm, auto ranging
Accuracy (Resistivity)	0.5% of reading ±1 digit
Resolution (TDS)	0.001 ppm minimum, auto ranging up to 4 significant digits
Calibration	Conductivity with calibration editing option and temperature
Alarm Output	High/low limit alarm, calibration due alarm
IP Rating	IP67
Model	Orion Star A322 Conductivity/TDS/Salinity/Resistivity/Temperature Portable Meter
Weight (English)	1.2 lb.
Resolution (Temperature)	0.1°C (0.1°F)
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C

Hanna Instruments™ Portable EC/TDS/Temperature Meter

Waterproof case and large, dual level LCD screen

Pricing and Availability
Specifications

Warranty	2 Years
Calibration Points	1
Type	Portable EC/TDS/Temperature Meter
Battery Life	Approximately 500 hr. of continuous use, auto-off after eight min. of non-use
Dimensions (L x W x H)	152 x 58 x 30 mm
Temperature Compensation	Automatic, 0 to 60°C (32 to 140°F) with β adjustable from 0.0 to 2.4%/°C with 0.1%
Display Type	LCD
Accuracy (TDS)	±2% Full-scale
Voltage	1.5V
Accuracy (Conductivity)	±2% Full-scale
Resolution (Temperature)	0.1°C (0.1°F)
Probe Type	HI 76306 EC/TDS probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included)
Accuracy (Temperature)	±0.5°C
Weight (Metric)	205 g

Thermo Scientific™ Orion Star™ A212 Conductivity Benchtop Meter

Reliably measure conductivity, TDS, salinity, resistivity and temperature with this conductivity benchtop meter for advanced lab analysis.

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Pricing and Availability
Specifications

Salinity Measurement Modes	Practical salinity (psu) or natural sea water (ppt)
Range (Resistivity)	2 ohm to 100.0 megohm
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Languages	English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Measurement Modes	Conductivity,TDS,Salinity,Resistivity with Temperature
Power Supply	Universal AC adapter (included) or 4 AA batteries (sold separately)
Battery Life	800 hr.
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	Graphic LCD with Backlight
Data Points	2000 with date and time stamp
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Stability	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Warranty	3 Year Meter
Resolution (Conductivity)	0.001 μS minimum, auto ranging up to 4 significant digits
Range (Conductivity)	0.001 μS/cm to 3000 mS/cm
Log Function Type	Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
Battery Type	4 x AA (sold separately)
Relative Humidity Range	5 to 85%, non-condensing
Dimensions (L x W x H)	24 x 18 x 11 cm (9.5 x 7.1 x 4.3 in.)
Accuracy (TDS)	0.5% of reading ±1 digit
Temperature Selection	Manual or automatic with ATC temperature probe
Keypad	Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB, RS232
Backlight Option	Yes, selectable
Compatible Probes	2-cell or 4-cell conductivity sensors with built-in temperature
Methods	10 per channel with password protection
Cell Constant	0.001 to 199.9cm-1
Temperature (Metric) Reference	5, 10, 15, 20, 25°C
Channels	1
TDS Factor Range	Linear (0.02 to 9.99)
Range (Salinity)	0.06 to 80.00 psu, 0.05 to 42.00 ppt
Temperature Compensation	Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off wit
Accuracy (Salinity)	0.5% of reading ±1 digit
Resolution (Salinity)	0.01 psu or 0.01 ppt minimum, auto ranging
Accuracy (Conductivity)	0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Inputs	8 pin MiniDIN (conductivity sensor with built-in temperature), stirrer input (stirrer probe)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	0.9 kg
Calibration Points (Conductivity)	5
Temperature (English) Operating	41°F to 113°F (ambient)
Resolution (Resistivity)	1 ohm or 0.1 megohm, auto ranging
Accuracy (Resistivity)	0.5% of reading ±1 digit
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
Resolution (TDS)	0.001 ppm minimum, auto ranging up to 4 significant digits
Calibration	Conductivity with calibration editing option and temperature
Alarm Output	High/low limit alarm, calibration due alarm
IP Rating	IP54
Model	Orion Star A212 Conductivity/TDS/Salinity/Resistivity/Temperature Benchtop Meter
Weight (English)	2 lb.
Resolution (Temperature)	0.1°C (0.1°F)
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C

Thermo Scientific™ Orion Lab Star EC112 Conductivity Bench Meters

Orion Lab Star EC112 conductivity bench meters measure conductivity, salinity or TDS with temperature, feature a large backlit display for easy viewability, and offer small footprint to save bench space. This conductivity meter is ideal for simplified, budget-friendly lab testing and data recording.

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Specifications

Salinity Measurement Modes	Natural Seawater (ppt) or Practical Salinity (PSU)
Memory	Non-volatile
Cell Constant	0.100 to 10.00 cm-1
Measurement Modes	Conductivity with Temperature,Salinity with Temperature,TDS with Temperature
Temperature (Metric) Reference	15.0, 20.0, 25.0 or 30.0°C
Temperature Coefficient	0 to 10 %/°C
TDS Factor Range	0.40 to 1.00
Range (Salinity)	0.00 to 80.0 ppt; 0.00 to 42.0 PSU
Data Management Details	Continuous, Auto-Read and Timed read modes
Temperature Compensation	Linear (0 to 10 %/°C) or off
Display Type	5 in. backlit LCD
Accuracy (Salinity)	±0.5 % of the reading ± 1 LSD
Resolution (Salinity)	0.01, 0.1 ppt; 0.01, 0.1 PSU
Accuracy (Conductivity)	±0.5 % of the reading ± 1 LSD
Data Points	500 data sets with time and date
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Inputs	8-pin MiniDIN for conductivity with built-in ATC
Accuracy (Temperature)	±0.3°C, ±0.5°F
Weight (Metric)	700 grams
Calibration Points (Conductivity)	1-5 points conductivity
Warranty	3 year meter warranty
Resolution (Conductivity)	0.01, 0.1, 1 μS; 0.01, 0.1 mS
Range (Conductivity)	0.00 μS to 500.0 mS
AC Adapter	Universal 100-240 V 50/60 Hz power supply with twist-and-lock meter connection and interchangeable wall plugs for US/Japan, Euro, UK/Singapore, Australia/New Zealand and China outlets
Log Function Type	Automatic with Auto-Read and Timed read modes, manual with Continuous read mode
Resolution (TDS)	0.01, 0.1, 1 ppm; 0.01, 0.1 ppt
Calibration	Conductivity, salinity, TDS and temperature
Calibration Points	1 point salinity, 1-5 points TDS, 1 point temperature
Alarm Output	Calibration reminder alarm
Dimensions (L x W x H)	187.2 x 155.2 x 61.7 mm, 7.37 x 6.11 x 2.43 in.
Accuracy (TDS)	±0.5 % of the reading ± 1 LSD
IP Rating	IP54
Temperature Selection	Manual or automatic with ATC temperature probe
Outputs	Computer or printer (STARA-106)
Backlight Option	Yes
Temperature Range (English)	23.0°F to 221.0°F
Weight (English)	1.54 lb.
Resolution (Temperature)	0.1°C, 0.1°F
Temperature Range (Metric)	-5.0°C to +105.0°C
Compatible Probes	2-cell and 4-cell conductivity electrodes

Mettler Toledo™ FiveGo™ F3 Conductivity Meters

Portable meter provides reliable and high quality conductivity measurements with simple click of a button

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Pricing and Availability
Specifications

Memory	200 measurements
Range (Conductivity)	0.00 μS/cm to 200 mS/cm
Languages	Chinese, Chinese (TW), Croatian, Czech, Danish, Dutch, English (GB), English (US), French, German, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (BR), Russian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Vietnamese
Calibration	One point calibration with three predefined standards
Channels	1
Dimensions (L x W x H)	18.8 x 7.7 x 3.3 cm (97.4 x 3 x 1.3 in.)
Temperature Compensation	Linear: 0.00%/°C to 10.00%/°C, reference temperature: 20° and 25°C
Display Type	LCD
Accuracy (Conductivity)	±0.5% of the measured value
Weight (English)	0.5 lb.
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	0°C to 100°C
Inputs	LTW 7-pin
Accuracy (Temperature)	±0.5°C
Weight (Metric)	0.26 kg

WTW™ inoLab™ Cond 7110 Conductivity Benchtop Meter

A compact and well-equipped conductivity benchtop meter for two and 4 electrode cells for routine measurements without documentation.

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Mettler Toledo™ FiveEasy™ Plus FP30 Conductivity Meters

Compact, benchtop meter provides high quality conductivity measurements with simple click of a button

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Pricing and Availability
Specifications

Resolution (Conductivity)	Automatic range
Memory	200 measurements, current calibration
Range (Conductivity)	0.01 μS/cm to 500 mS/cm
Calibration	One point calibration with three predefined standards, manual cell constant input
Dimensions (L x W x H)	22.7 x 14.7 x 7 cm (9 x 5.7 x 2.7 in.)
Data Management Details	RS232 or USB ports
Temperature Compensation	Linear: 0.00%/°C to 10.00%/°C, reference temperature: 20° and 25°C
Voltage	100/240V
Accuracy (Conductivity)	±0.5% of the measured value
Frequency	50/60Hz
Temperature Range (English)	32°F to 212°F
Weight (English)	1.4 lb.
Resolution (Temperature)	0.1°C
Inputs	Mini-DIN
Accuracy (Temperature)	0.3°C
Weight (Metric)	0.63 kg

Oakton™ CON 6+ Portable Conductivity Meters, CON 6+

Autoranging conductivity with temperature measurement.

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Pricing and Availability
Specifications

Height (Metric)	4.2 cm
Width (English)	3.37 in.
Length (Metric)	15.7 cm
Resolution (Conductivity)	0.01μS, 0.1μS, 1μS, 0.01mS, 0.1mS
Range (Conductivity)	0 to 20 μS, 0 to 200 μS, 0 to 2000 μS, 0 to 20 mS, 0 to 200 mS
Sensor Types	Conductivity
Cell Constant	0.1, 1.0, 10cm^-¹
Measurement Modes	Conductivity,TDS
Battery Type	4 x AA
Calibration Points	5
Battery Life	100 hr.
Temperature Compensation	Automatic
Voltage	1.5V
Accuracy (Conductivity)	±1% Full-scale
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	-10°C to +110°C
Accuracy (Temperature)	±0.5°C
Height (English)	1.68 in.

Thermo Scientific™ Orion Star™ A222 Conductivity Portable Meter

Reliably measure conductivity, TDS, salinity, resistivity and temperature with this conductivity portable meter for advanced field analysis.

Promotions are available

Pricing and Availability
Specifications

Salinity Measurement Modes	Practical salinity (psu)
Range (Resistivity)	2 ohm to 100.0 megohm
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Languages	English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Measurement Modes	Conductivity,TDS,Salinity,Resistivity with Temperature
Battery Life	800 hr.
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	Graphic LCD with Backlight
Data Points	1000 with date and time stamp
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Stability	Smart Stability and Smart Averaging
Warranty	3 Year Meter
Resolution (Conductivity)	0.001 μS minimum, auto ranging up to 4 significant digits
Range (Conductivity)	0.001 μS/cm to 3000 mS/cm
Log Function Type	Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
Battery Type	4 x AA (included)
Relative Humidity Range	5 to 85%, non-condensing
Dimensions (L x W x H)	24 x 10 x 6.5 cm (9.5 x 3.9 x 2.6 in.)
Accuracy (TDS)	0.5% of reading ±1 digit
Temperature Selection	Manual or automatic with ATC temperature probe
Keypad	Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB, RS232
Backlight Option	Yes, selectable
Compatible Probes	2-cell or 4-cell conductivity sensors with built-in temperature
Methods	10 per channel with password protection
Cell Constant	0.001 to 199.9cm-1
Temperature (Metric) Reference	15, 20, 25°C
Channels	1
TDS Factor Range	Linear (0.02 to 9.99)
Range (Salinity)	0.06 to 80.00 psu, 0.05 to 42.00 ppt
Temperature Compensation	Linear, nLFn (non-linear ultra pure water) or off
Accuracy (Salinity)	0.5% of reading ±1 digit
Resolution (Salinity)	0.01 psu or 0.01 ppt minimum, auto ranging
Accuracy (Conductivity)	0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Inputs	8 pin MiniDIN (conductivity sensor with built-in temperature)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	0.5 kg
Calibration Points (Conductivity)	5
Temperature (English) Operating	41°F to 113°F (ambient)
Resolution (Resistivity)	1 ohm or 0.1 megohm, auto ranging
Accuracy (Resistivity)	0.5% of reading ±1 digit
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Resolution (TDS)	0.001 ppm minimum, auto ranging up to 4 significant digits
Calibration	Conductivity and temperature
Alarm Output	Calibration due alarm (fixed 12 hour)
IP Rating	IP67
Model	Orion Star A222 Conductivity/TDS/Salinity/Resistivity/Temperature Portable Meter
Weight (English)	1.2 lb.
Resolution (Temperature)	0.1°C (0.1°F)
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C

Jenway™ Conductivity Meter

Easy-to-use, broadly applicable conductivity meter. Jenway™ Conductivity Meter features automatic conductivity standard recognition and endpoint detection.

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METTLER TOLEDO™ SevenExcellence™ S700 Conductivity Benchtop Meter

The S700 meter measures conductivity, resistivity, TDS, and salinity. Its capabilities can be expanded with additional modules to measure pH, dissolved oxygen, ISE, BOD, Redox/ORP, and ISFET. Features an intuitive touchscreen and the ability to create measurement shortcuts.

Pricing and Availability
Specifications

Calibration Points	13 Pre defined and 20 user defined standard
Temperature Compensation	20°C
Range (Resistivity)	0.01 to 100 megohm/cm
Range (Conductivity)	0.001 μS/cm to 2000 mS/cm
Accuracy (Conductivity)	±0.5%
Sensor Types	Conductivity
Data Points	At least 20000 data points, 250 analyses
Range (TDS)	0.001 mg/L to 1000 g/L
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	-30°C to +130°C
Inputs	Integrated interfaces (USB, RS232 and Ethernet)
Accuracy (Temperature)	±0.1°C
Range (Salinity)	0 to 80 psu

Jenway™ Bench pH/Conductivity Meter 3540

Ideal for use in all laboratories where pH and conductivity analyses are required. The setup menu gives quick and easy access to the whole range of instrument, pH and conductivity measurement options.

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Mettler Toledo™ FiveEasy™ F30 Conductivity Meters

Compact, benchtop meter provides high quality conductivity measurements with simple click of a button

Promotions are available

Pricing and Availability
Specifications

Resolution (Conductivity)	Automatic range
Memory	Current calibration
Range (Conductivity)	0.01 μS/cm to 200 mS/cm
Calibration	One point calibration with three predefined standards
Dimensions (L x W x H)	22.7 x 14.7 x 7 cm (9 x 5.7 x 2.7 in.)
Temperature Compensation	Linear: 0.00%/°C to 10.00%/°C, reference temperature: 20° and 25°C
Voltage	100/240V
Accuracy (Conductivity)	±0.5% of the measured value
Frequency	50/60Hz
Temperature Range (English)	32°F to 212°F
Weight (English)	1.4 lb.
Resolution (Temperature)	0.1°C
Inputs	Mini-DIN
Accuracy (Temperature)	0.5°C
Weight (Metric)	0.63 kg

WTW™ inoLab™ Cond 7310™ Precise and Convenient Conductivity Meter

Precise and convenient conductivity meter product type that includes meter with universal power supply, stand and operation manual, software and USB cable.

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WTW™ ProfiLine™ Portable Conductivity Meters

Obtain optimum results automatically measuring and evaluating data with this combination of robust conductivity pocket meter and data logger.

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Specifications

Memory	Manual 200/5000 automatic
Cell Constant	Fixed: 0.475cm^–1/cm^–1, Calibratable: 0.450 to 0.500cm^–1/0.585to 715cm^–1/0.800 to 1.200cm^–1
For Use With (Application)	For professional field measurements requiring documentation and data transfer
Width (Metric)	17.7 cm
Power Supply	4 x 1.5V AA or 4 x 1.2V NiMH rechargeable batteries, or via USB
Range (Salinity)	0 to 70 ppt
Battery Life	Up to 1000 hr.
Temperature Compensation	Automatic
Display Type	LCD
Accuracy (Salinity)	±0.2% Full-scale
Resolution (Salinity)	0.1 ppt
Accuracy (Conductivity)	±0.5% Full-scale ±1 LSD
Data Points	5000
Certifications/Compliance	cETLus, CE
Accuracy (Temperature)	±0.1°C
Weight (Metric)	0.6 kg
Height (Metric)	7.9 cm
Warranty	3 Years
Resolution (Conductivity)	0.01, 0.1 mS
Range (Conductivity)	0 μS to 1000 mS
Sensor Types	DIN/4 mm Banana
Range (TDS)	0 to 200 ppt
Resolution (TDS)	0.01, 0.1 ppt
Battery Type	4 x 1.5V AA or 4 x 1.2V NiMH
Calibration Points	1
Type	Portable Conductivity Meter
Accuracy (TDS)	±0.5% Full-scale
IP Rating	IP67
Depth (Metric)	5.7 cm
Model	Cond 3310
Resolution (Temperature)	0.1
Temperature (Metric) Operating	-5°C to +105°C

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Thermo Scientific™ Orion Star™ A322 Conductivity Portable Meter SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Thermo Scientific™ Orion Star™ A212 Conductivity Benchtop Meter SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

WTW™ inoLab™ Cond 7110 Conductivity Benchtop Meter Greener Choice ProductThis product offers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More About the Greener Choice Program

Thermo Scientific™ Orion Star™ A222 Conductivity Portable Meter SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

WTW™ inoLab™ Cond 7310™ Precise and Convenient Conductivity Meter Greener Choice ProductThis product offers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More About the Greener Choice Program

Thermo Scientific™ Orion Star™ A322 Conductivity Portable Meter

Thermo Scientific™ Orion Star™ A212 Conductivity Benchtop Meter

WTW™ inoLab™ Cond 7110 Conductivity Benchtop Meter

Thermo Scientific™ Orion Star™ A222 Conductivity Portable Meter

WTW™ inoLab™ Cond 7310™ Precise and Convenient Conductivity Meter