AquaSearcher™ AB41PH Bench Meter

An advanced, research-grade benchtop pH meter offering accurate, repeatable results.

The OHAUS AquaSearcher™ AB41PH bench meter is designed with reliable measurement and precise performance in mind. The i-Steward ensures repeatable and consistent measurement accuracy for optimal peace of mind and can assist with compliance with 21 CFR Part 11 regulations.

• Applications
• pH, oxidation-reduction potential (ORP) with Temperature Measurements
• Display
• 6.5 In. Segment & Dot matrix LCD with backlight
• Operation
• Capacitive touch, ABS top housing, standalone electrode holder
• Communication
• RS232, USB Device (included), GLP/GMP data output with real-time clock
• Construction
• AC adapter (included)
• Design Features
• i-Steward, 3 endpoint modes, calibration due alarm, 1,000 measurement memory, ten most recent calibrations, password management

Specifications
 

Item #	30589830	30589831
Measurement Range	-2.000 to 20.000 pH;  -10.0ºC to 125.0ºC;  -2000.00 to +2000.00 mV
Measurement Resolution	0.1°C;  0.1 mV;  0.001 pH
Accuracy	±0.3°C;  ±0.3 mV;  ± 0.002 pH
Display	LCD with backlight & one-line dot matrix
Electrode	Not included	ST410 (Included)
Accuracy ± (mV)	0.3 mV
Accuracy ± (Temp.)	0.3ºC
Dimensions (D x W x H)	8.3 x 5.6  x 2 In. | 210 x 142 x 51 mm
Net Weight	1.1 lb | 0.5 kg
Parameter	pH / mV / ORP
pH accuracy (±)	0.002 (±)
Power	AC Adapter (Included)
Temp. Sensor	No	30 KΩ NTC
Work Environment	41 ºF to 104 ºF (5 °C to 40 °C), 80% RH, Non-condensing

 

AquaSearcher™ AB33PH Bench Meter

Highly reliable and user-friendly pH benchtop meter for standard laboratory applications.

The next step in the evolution of OHAUS’ original Starter Series, the all-new AquaSearcher™ AB33PH bench meter is designed to be reliable, efficient, and user-friendly. The i-Steward ensures repeatable and consistent measurement accuracy for optimal peace of mind. The large LCD display and touch keypad make changing the parameters, executing setup, and performing calibration as simple as using a smartphone.

• Applications
• pH, oxidation-reduction potential (ORP) with Temperature Measurements
• Display
• 6.5 In. Segment & Dot matrix LCD with backlight
• Operation
• Capacitive touch, ABS top housing, standalone electrode holder
• Communication
• RS232, USB Device (included)
• Construction
• AC adapter (included)
• Design Features
• i-Steward, Calibration due alarm, 1,000 measurement memory

Specifications
 

Item #	30589826	30589827
Measurement Range	-5°C to 110°C;  -2000.00 to +2000.00 mV;  -2.00 to 16.00 pH
Measurement Resolution	0.1°C;  1 mV;  0.01 pH
Accuracy	±0.5°C;  ±1 mV;  ±0.01 pH
Display	LCD with backlight & one-line dot matrix
Electrode	Not included	ST310 (Included)
Accuracy ± (mV)	1 mV
Accuracy ± (Temp.)	0.5°C
Dims (D x W x H)	8.3 x 5.6 x 2 In. | 210 x 142 x 51 mm
Net Weight	1.1 lb | 0.5 kg
Parameter	pH / mV / ORP
pH Accuracy (±)	0.01
Power	AC Adapter (Included)
Temp. Sensor	No	N/A
Work Environment	41ºF to 104ºF (5ºC to 40ºC), 80% RH, Non-condensing

 

AquaSearcher™ AB33M1 Bench Meter

Easy-to-use and accurate multi-parameter benchtop meter.

The AquaSearcher™ AB33M1 multi-parameter bench meter is designed with reliable measurement and user interface in mind. The i-Steward ensures repeatable and consistent measurement accuracy for optimal peace of mind. The 6.5 In. LCD display and touch keypad make changing the parameters, executing setup, and performing calibration as simple as using a smartphone.

• Applications
• pH, Oxidation-Reduction Potential (ORP), Conductivity, Total Dissolved Solids (TDS), Salinity, and Resistivity with Temperature Measurements
• Display
• 6.5 In. Segment & Dot matrix LCD with backlight
• Operation
• Capacitive touch, ABS top housing, standalone electrode holder
• Communication
• RS232, USB Device (included)
• Construction
• AC adapter (included)
• Design Features
• i-Steward, Two Independent Channels, Calibration due alarm, 1,000 measurement memory

Specifications
 

Item #	30589824	30589825
Measurement Range	-5°C to 110°C;  -2000.00 to +2000.00 mV;  -2.00 to 20.00 pH
Measurement Resolution	0.1°C;  0.1 mV;  0.01 pH
Accuracy	±0.3°C;  ±0.5 mV;   ±0.01 pH
Display	LCD with backlight & one-line dot matrix
Electrode	Not included	ST310 (Included);  STCON3 (Included)
Accuracy ± (mV)	0.5 mV
Accuracy ± (Temp.)	0.3°C
Conductivity Accuracy (±)	0.50%
Conductivity Measuring Range	0.01 – 500 mS / cm
Dims (D x W x H)	8.3 x 5.6 x 2 In. | 210 x 142 x 51 mm
Net Weight	1.1 lb | 0.5 kg
Parameter	pH / Cond.
pH Accuracy (±)	0.01
Power	AC Adapter (Included)
Resistivity Measuring Range	2 Ohm to 100 MOhm
Resistivity Resolution	0.01 Ohm
Temp. Sensor	No	N/A
Work Environment	41ºF to 104ºF (5ºC to 40ºC), 80% RH, Non-condensing

 

AquaSearcher™ AB23PH Bench Meter

Designed with a large LCD Display and six instructional menu buttons, AB23PH is a simple pH meter. Auto buffer recognition and 3-point calibration capability ensure a reliable calibration result. Stand-alone holder increases the flexibility for routine experiments, and makes AB23PH a perfect space-saving bench meter for your lab. A 99-item memory for pH measurements ensures efficient data documentation.

• Applications
• pH, oxidation-reduction potential (ORP) with Temperature Measurements
• Display
• 5 inch segment LCD with backlight
• Operation
• AC adapter (included)
• Communication
• N/A
• Construction
• ABS housing, mechanical keys, built-in electrode holder
• Design Features
• Auto buffer recognition, two-point calibration, electrode condition icon  

Includes

• Power Cord
• AB23PH Benchtop Meter
• ST322 pH Electrode
• Stand-Alone Electrode Holder
• pH Mini Buffer Kit (4 x 50 mL) 

Don’t forget to check out our PR1MA Buffers!
 

Specifications
 

Measurement Range	0 - 100ºC 0.00 - 14.00 pH -1999 - 1999 mV
Measurement Resolution	0.1ºC 0.01 pH 1 mV
Accuracy	±0.5ºC ±0.01 pH ±1 mV
Dimensions (D x W x H)	8.3 x 5.6 x 2 In. 210 x 142 x 51 mm
Net weight	0.8 lb. | 0.38 kg.
Display	LCD w/ backlight
Electrode	ST322 (Included)
Parameter	pH / ORP
Power	AC Adapter (Included)

 

OHAUS Starter Portable pH Meter

After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in the form of a portable pH meter. This portable meter offers convenience, reliability and durability in one compact design.

• Applications
• pH, oxidation-reduction potential (ORP) measurement
• Display
• Liquid crystal display (LCD)
• Operation
• 4 AAA batteries (included)
• Communication
• N/A
• Construction
• ABS housing, wrist strap
• Design Features
• Automatic and manual temperature compensation, auto buffer recognition, calibration icon

Specifications
 

83033961	83033962	30219114
ST300-B, ST322 3-in-1 Plastic Gel pH Electrode, and pH Buffer Powder Sachet	300 Meter with IP54 Sets, Electrode Clip, Wrist Strap and 4 AAA Batteries (Electrode Not Included)	ST300-B, ST322 3-in-1 Plastic Gel pH Electrode, pH Buffer Powder Sachet (4.01, 7.00, 10.01), Portable Bag

 

Item #	83033961	83033962	30219114
Measurement Range	0 – 100°C;  0.00 – 14.00 pH;  -1999 – 1999 mV
Measurement Resolution	0.1 °C;  0.01 pH;  1 mV
Accuracy	±0.5 °C;  ±1 mV;  ±0.01 pH
Display	LCD
Electrode	ST322(Included)	ST320 (As Accessory)	ST322(Included)
Accuracy ± (mV)	1 mV
Accuracy ± (Temp.)	0.5 °C
Battery Life	500 Hours with Disposable Batteries
Calibration	3 Point
Dims (D x W x H)	6.69 in x 3.54 x 1.38 In. | 170 x 35 x 90 mm
In-Use Cover	No
Measurement Range (Temp.)	0°C to 100°C
Measurement Range (mV)	-1,999 mV to 1,999 mV
Net Weight	0.35 lb | 0.16 kg
Parameter	pH / ORP
pH Accuracy (±)	0.01
pH Measuring Range	0 to 14
pH Resolution	0.01
Power	4 AAA (LR03) Batteries (Included)
Resolution (Voltage)	1 mV
Temp. Compensation	Yes		Automatic
Temp. Resolution	0.1 °C
Temp. Sensor	30 KΩ NTC
Work Environment	41°F to 104°F (5°C to 40°C), 80% RH, Non-condensing

 

OHAUS Starter Portable Waterproof pH Meters

Durable, Waterproof, Battery-Operated, pH Meters Ideal for Field Testing.

Starter 400 Portable Water Analysis Meters are robust, lightweight, battery-operated units with waterproof housing, which makes them ideal for prolonged use in wet environments. Includes a rubber protective case fit for field testing. A rechargeable lithium battery ensures hours of trouble-free testing in the field. Intuitive software and an easy-to-view LCD allow for simple operation. A built-in USB port enables easy data transfer.

• Applications
• pH, Oxidation-Reduction Potential (ORP) measurement
• Display
• Backlit Liquid Crystal Display (LCD)
• Operation
• Rechargeable lithium battery
• Communication
• Built-in micro-USB port
• Construction
• IP67 waterproof plastic housing, IP67 probes, rubber cover
• Design Features
• Data storage of up to 1000 items

Specifications
 

30468964	30468965	30468966
400 Meter with IP67 Rubber Housing, Electrode Clip, Wrist Strap and 4 AAA Batteries (Probes Not Included)	ST400-B with ST320 IP67 3m Probe	ST400-F with Portable Bag

OHAUS Starter Portable Multi-Parameter pH Meters

Durable, Waterproof Battery-Operated Multi-Parameter Meters Ideal for Field Testing.

Starter 400M Multi Parameter Portable Water Analysis Meters are robust, lightweight, battery-operated units with waterproof housing, which are ideal for testing pH, conductivity, TDS, salinity and resistivity in wet environments. A rechargeable lithium battery ensures hours of trouble-free testing in the field. Intuitive software and an easy-to-view LCD allow for simple operation. A built-in USB port enables easy data transfer.

• Applications
• pH, Conductivity, TDS, Salinity and Resistivity Testing
• Display
• Backlit Liquid Crystal Display (LCD)
• Operation
• Rechargeable lithium battery
• Communication
• Built-in micro-USB port
• Construction
• IP67 waterproof plastic housing, IP67 probes, rubber cover
• Design Features
• Data storage of up to 1000 items 

Specifications
 

30468990	30468991	30468992
400M Meter with IP67 Rubber Housing, Electrode Clip, Wrist Strap and 4 AAA Batteries (Probes Not Included)	ST400M-B with ST320 IP67 3m and STCON3 IP67 3m probes	ST400M-F with Portable Bag

 

Measurement Range	0-20 MΩ•cm | -5 °C to 110 °C | -2.00 to 16.00 pH | 00.0 μS/cm to 199.9 mS/cm  0.1 mg/L to 199.9 g/L (TDS) | -1999 to 1999 mV | 0-99.9 psu
Measurement Resolution	0.01 mg/L |  0.01 psu |  0.1 °C | 0.1 μs/cm | 0.01 pH | 0.01 Ω•cm | 1 mV
Accuracy	± 0.5 % F.S.; ±0.3 °C; ±1 mV; ±0.01 pH
Display	LCD Backlit Display
Electrode	ST320 IP67 3m | STCON3 IP67 3m | *Not included with Item # 30468991
mV Accuracy	± 1 mV
Temp. Accuracy	± 0.3 °C
Battery Life	40 Hours with Rechargeable Battery
Conductivity Accuracy	± 0.5%
Conductivity Range	0.01 μS/cm to 199.9 mS/cm
Dimensions (D x W x H)	9.05 x 1.57 x 3.94 In. | 230 x 40 x 100 mm
Temp. Range	-5 °C to 110 °C
Measurement Range	-1,999 mV to 1,999 mV
Net Weight	0.77 lb | 0.35 kg
pH Accuracy	± 0.01
pH Measuring Range	-2 to 16
pH Resolution	0.01
Resistivity Measuring Range	0 MOhm to 20 MOhm
Resistivity Resolution	0.01 MOhm
Resolution Cond.	0.1 to 199.9 (Variable)
Resolution	1 mV (Voltage)
Temp. compensation	Automatic
Temp. resolution	0.1 °C
Temp. Sensor	30 KΩ NTC
Work Environment	41°F to 104°F (5°C to 40°C), 80% RH, Non-condensing

The OHAUS High-Performance pH Meter for Standard Lab Applications (30058489) has been discontinued.

A replacement model (AB23PH-F) can be found here.

OHAUS pH Meters
 

ST2100-E

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 benchtop pH meters. Starter 2100 is the economical choice for applications requiring simple pH measurement.

Applications
pH, oxidation-reduction potential (ORP) measurement

Display
Liquid crystal display (LCD)

Operation
AC adapter (included)

Communication
N/A

Construction
ABS housing, built-in electrode holder

Design Features
Auto buffer recognition, two-point calibration, quick reference guide

ST3100-F

Starter 3100 has many smart features that make it as intuitive as it is accurate for standard pH measurement.

Applications
pH, oxidation-reduction potential (ORP) measurement

Display
Backlit liquid crystal display (LCD)

Operation
AC adapter (included)

Communication
RS232 (included)

Construction
ABS housing, standalone electrode holder, replaceable in-use cover

Design Features
99 measurement memory, automatic and manual endpoint functions, automatic and manual temperature compensation, quick reference guide

ST5000-F

Starter 5000 provides accurate pH and ORP measurement for high-level experiments and research. Enhanced features, advanced technology, and high performance have been combined to support complex laboratory tasks requiring pH measurement.

Applications
pH, oxidation-reduction potential (ORP) measurement

Display
Backlit liquid crystal display (LCD), touchscreen

Operation
AC adapter (included)

Communication
RS232 and USB (included). GLP/GMP data output with real-time clock.

Construction
ABS housing, standalone electrode holder, replaceable in-use cover

Design Features
3 endpoint modes, continuous measurement mode, up to 9-point calibration, 1,000 measurement memory

Specifications

• Compact basic series - for the usual applications, made from the universal A-type membrane glass
• Comfortable handling, stylish design and reliable function
• Liquid electrolyte electrodes with unique platinum diaphragm and refill port slider
• Each electrode with individual serial number
• Fits both Pinnacle and SI Analytics pH meters
• Includes 1 m fixed cable

The 3-in-1 electrodes measure pH, reference, and temperature in one electrode. These electrodes are constructed out of an epoxy material for increased strength and durability. The 3-in-1's temperature compensation will only work with our 300 and 400 series meters. The refillable 3-in-1 electrode has a patented ion barrier which produces the fast response of an Ag/AgCl electrode without the use of AgCl in the reference solution. This results in a tris compatible electrode. This electrode also features patented replaceable junction for extended electrode life.

Special Features: Replaceable Junctions

Slow response times and unstable readings are most often caused by clogged or contaminated reference junctions. Our patented replaceable junction lets you restore your electrode to like-new performance in minutes, at a fraction of the cost of a new electrode.

Enterprise 350 pH Meter

• Simultaneous pH and temperature display
• Storage of up to 32 results
• Automatic or manual calibration 500 hours battery life
• Application specific electrodes and consumables

The 350271 is a general purpose portable pH meter offering 1 or 2 point pH calibration and automatic buffer recognition with manual override. It simultaneously displays both the temperature compensated pH readings and the manually set temperature.