pH is a common measure of water quality used in environmental testing, food & beverages, cosmetics, pharmaceuticals and other fields. pH measures the acidity/alkalinity of a solution on a scale of 1 to 14 pH, with 1 being the most acidic and 14 being the most alkaline or basic.
Four basic styles of pH meters are available for varying applications: Pens, Portable Meters, Data Loggers and Benchtop meters.
Test Tube pH Pens
Fits standard test tubes 16 x 50 mm or larger.
Highly stable and accurate readings with a large LCD display. Designed for simple one-hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize some other non-standard buffers as well. Features hold function, and auto power off with low battery indicator.
- General Purpose
- Glass Probe: EPA compliant for labs and wine
- Penetration Probe: for food & soil
- Flat Tip Probe: for meat, leather, paper, skin, and other surface pH measurements
Dimensions: 9″ × 1⅜” × 1″ (225 × 35 × 20 mm)
Weight: 2.3 oz (66 g)<
| Model: | 850062 | 850063 | 850065 | 850066 | 850067 |
| Tip: | General Purpose | Glass | Flat | Penetration | |
| Range: | 0 to 14 | 0 to 14 | 0 to 14 | 2 to 12 | 2 to 12 |
| Resolution: | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| Accuracy: | ±0.2 pH | ±0.1 pH | ±0.1 pH | ±0.1 pH | ±0.1 pH |
| Auto 3pt Calibration: |  | | | | |
| IP65 Waterproof: | | | | | |
| Indicates Low Battery: | | | | | |
| Auto Power Off: | | | | | |
| Auto Buffer Recognition: | | | | | |
| Hold: | | | | | |
| Auto Temp Compensation: | | | | | |
| °C & °F Display: | | | | | |
| Probe Length: | 5⅛” × ½” (130 × 12 mm) | 5¼” x ½” (132 x 12 mm) | 5” x ½” (125 x 12 mm) | 5 5/16” x ½” (134 x 12 mm) | |
Digital pH Pen - Large Display
Highly Stable and Accurate pH Readings with a Large LCD Display. Designed for Simple, One-Handed Operation.
Automatically calibrates to pH 4, 7, 10 buffers and can be adjusted to recognize non-standard buffers as well. These pH pens offer unbeatable solutions for applications such as waste-water, surface water, aquaculture, hydroponics, pools, and education. They each feature hold function, and auto power off with low battery indicator.
The cases are IP65 waterproof, and will float if accidentally dropped into the water. They come with 4 button-cell batteries and a built-in electrode kept moist with a protective cap.
Item #850050 – Large Display pH Pen
Has a Range of 2 to 12 with an Accuracy of ±0.3 pH and is the perfect instrument for economical spot sampling of pH.
Item #850051 – Large Display ATC pH Pen
Has a Range of 0 to 14 with an Accuracy of ±0.2 pH and is the right instrument for spot sampling of pH and temperature. Displays temperature in both °C and °F.
Item #850052 – Large Display ATC 0.01 pH Pen
Has a Range of 0 to 14 with an Accuracy of ±0.05 pH and is the ideal instrument when you need laboratory accuracy in the field for sampling of pH and temperature. Displays temperature in both °C and °F.
Dimensions: 6½” × 1½” × 1½” (165 × 38 × 38 mm)
Weight: 2.3 oz (65 g)
| Product: | Large Display 850050 | Large Display ATC 850051 | Large Display ATC 0.01 850052 |
| Range: | 2 to 12 | 0 to 14 | 0 to 14 |
| Resolution: | 0.1 | 0.1 | 0.01 |
| Accuracy: | ±0.3 pH | ±0.2 pH | ±0.05 pH |
| Auto 3 pt Calibration: | 3 pt | 3 pt | 3 pt |
| Waterproof: | | | |
| Indicates Low Battery: | | | |
| Auto Power Off: | | | |
| Auto Buffer Recognition: | | | |
| Hold: | | | |
| Auto Temp Compensation: | | | |
| °C & °F Display: | | | |
| Special Features: | Floats | ||
| Product: | Large Display 850050 | Large Display ATC 850051 | Large Display ATC 0.01 850052 |
| Range: | 2 to 12 | 0 to 14 | 0 to 14 |
| Resolution: | 0.1 | 0.1 | 0.01 |
| Accuracy: | ±0.3 pH | ±0.2 pH | ±0.05 pH |
| Auto 3 pt Calibration: | 3 pt | 3 pt | 3 pt |
| Waterproof: | | | |
| Indicates Low Battery: | | | |
| Auto Power Off: | | | |
| Auto Buffer Recognition: | | | |
| Hold: | | | |
| Auto Temperature Compensation: | | | |
| °C & °F Display: | | | |
| Special Features: | Floats | ||
Basic pH Meter
Basic pH Meter – #840087
Simple to operate and works with any electrode with a BNC connector. Measures the full 0 to 14 pH range with a high 0.01 pH resolution. Features 3-pt. calibration, hold function available, fold-out easel back and a tripod screw. Comes with a 9V battery, calibration tool, and full instructions. PROBE NOT INCLUDED.
Basic pH Meter Kit – #840088
Includes everything necessary for immediate field use:
- Basic pH Meter 840087
- Epoxy body, sealed reference combination electrode with a BNC connector
- 2½-ft cable
- pH buffers 4 and 7, deionized water
- Instructions and a 9V battery
- Hard shell carrying case
Meter Dimensions: 8″ × 2¾” × 1″ (203 × 70 × 25 mm)
Meter Weight: 7.2 oz (204 g)
Kit Dimensions: 11″ × 9½” × 2″ (279 × 241 × 51 mm)
| Range: | Resolution: | Accuracy: |
| 0 to 14 pH | 0.01 pH | ±0.07 pH (pH 5 to 9) ±0.2 pH (<5 pH, >9 pH) Meter only, after calibration and including error for temperatures of 23 ± 5ºC. |
Advanced pH Meter
Reads either pH (in 0.01 resolution) or mV in large digits, with time, date, and temperature (in °C or °F) shown simultaneously on the lower display.
Also indicates stable reading, low battery and displays calibration data. Scroll 99 data points with time stamps and min/max readings directly on the backlit LCD. Features hold, up to 5 point calibration, N.I.S.T. buffer recognition, manual or automatic temperature compensation and a USB port.
In order to connect this model to a computer to stream data, you will need the USB Cable 840054 and Data Acquisition Software 840052. Comes with 4 AAA batteries. Uses optional AC Adapter #840027. Will accept any pH or ORP probe with a BNC connector. PROBE NOT INCLUDED.
Advanced pH Meter – Item #850055:Includes meter only – Probe and accessories sold separately.
Advanced pH Meter Kit – Item #850056 includes:
- Advanced pH Meter 850055
- Detachable, temperature compensated pH probe with 3½-ft cable
- pH buffers 4, 7, 10 and distilled water
- Hard shell foam lined carrying case
Meter Dimensions: 7″ × 2¾” × 1¼” (178 × 70 × 32 mm)
Meter Weight: 6.5 oz (184 g)
Kit Dimensions: 14″ × 9″ × 2¾” (356 × 229 × 70 mm)
| Unit of Measure: | Range: | Resolution: | Accuracy: |
| pH: | 0 to 14 | 0.01 | ±0.02 pH |
| mV: | -499 to 499 | ±0.1 mV (-199.9 to 199.9 mV) otherwise ±1 mV | ±0.2 mV (-199.9 to 199.9 mV) otherwise ±2 mV |
| ORP: | -199.9 to 199.9 | ||
| Temperature ºF: | 23 to 176ºF | 0.1° | ± 2ºF |
| Temperature ºC: | -5 to 80ºC | ±1ºC |
SD Card Datalogger pH Meter
Reads pH and temperature. ORP readings are available with the optional probe.
Records data onto standard SD memory cards (like a digital camera). When full, simply exchange SD cards for unlimited data storage. The removable SD card is easy to transport and insert into a computer’s memory card slot or SD card reader.
Uploads pre-formatted data to Excel, without the need for additional software and cables. Additional SD cards are readily available in a variety of memory sizes. Each data set includes pH, temperature, time and date. Features ATC (automatic temperature compensation) or manual temperature adjustment, automatic calibration recognition, min/max, auto power-off, low battery indicator and hold function.
This well-made unit is extremely accurate with fast response times and includes a fold-out easel back and a large easy-to-read backlit LCD. Comes ready to use in a soft carrying case with 6 AA batteries, instruction manual, and an SD card. Uses optional USB Power Cable (840058), or AC Adapter (840097). ATC temperature probe (840038) available as an optional accessory. Will accept any pH or ORP probe with a BNC connector.
Dimensions: 7″ × 2¾” × 1¾” (178 × 70 × 44 mm)
Weight: 1 lb. (0.45 kg)
Item #850061 – pH SD Card Logger Kit
Contains everything necessary for immediate field use:
- pH SD Card logger 850060
- Sealed epoxy body reference combination electrode with a BNC connector
- 2½-ft cable
- ATC temperature probe
- pH buffers 4, 7, 10 and deionized water
- Batteries and instructions
- Hard-shell foam-lined case
| Unit of Measure: | Range: | Resolution: | Accuracy: |
| pH: | 0 to 14 pH | 0.01 pH | ± 0.04 pH |
| mV: | -1999 to 1999 mV | 1 mV | ± 0.5%rdg +2 d |
| ORP: | -0 to 1999 mV |
Basic pH Meter Kit
| Range: | Resolution: | Accuracy: |
| 0 to 14 pH | 0.01 pH | ±0.07 pH (pH 5 to 9) ±0.2 pH (<5 pH, >9 pH) Meter only, after calibration and including error for temperatures of 23 ± 5ºC. |
Water Quality Meter Kit
Interchangeable plug and play probes let this versatile meter read pH, mV, ORP, conductivity, salinity, TDS, DO and temperature.
Order probes only for parameters currently required, and add additional probes in the future. The back-lit display simultaneously reads temperature in user selectable °C & °F. All measurements are automatically temperature compensated. DO measurements can be compensated for salinity, while Oxygen in Air (O2) can be compensated for altitude.
Automatic calibration recognition of pH buffers 4, 7 and 10. Also features auto power off, hold, min/max, fold-out easel back and a tripod screw. Comes with 9V battery and hard-shell, foam-lined carrying case with room for one or two probes (not included). EPA Equivalency Method: 360.1 and Alpha Method 2580.1992.
Meter Dimensions: 7″ × 2¾ × 2″ (177 × 68 × 45 mm)
Includes everything needed for immediate field use as a pH meter:
- Water Quality Meter #850081
- pH Probe #840016
- ATC Temperature Probe #840038
- pH buffers 4, 7 & 10
- De-ionized water
- 9V battery
- Instructions
- Hard Shell Foam-lined Carrying Case
| Display: | 15mm (0.6”) Digit Size |
| pH Calibration: | pH 7, pH 4 & pH 10 |
| Operating Temperature: | 0°C to 50°C (32°F to 122°F) |
| Operating Humidity: | Max 80% RH |
| Sampling Time: | Approximately 0.8 seconds. |
| Power Supply: | 006P DC 9V battery (Alkaline or heavy duty) |
| Unit of Measure: | Range: | Resolution: | Accuracy: | |
| pH & ORP BNC connector: (meter only) | pH | 0 to 14 | 0.01 | ± (0.02PH + 2d) |
| mV | 0 to 1999 | 1 | ± (0.5% + 2d) |
| Probes Specs. For meter only, probe specs may vary | ||||
| Item | Unit of Measurement | Range | Resolution | Accuracy |
| pH Probe 840016 (BNC connector) | pH | 0 to 14 | 0.01 | ±(0.02pH+2d) |
| Spear Tip pH Probe 840049 (for non-liquid measurement, BNC connector) | pH | 1 to 13 | 0.01 | ±(0.02pH+2d) |
| Flat Surface pH Probe 840051 (BNC connector) | pH | 1 to 13 | 0.01 | ±(0.02pH+2d) |
| ORP Probe 850088 | mV | 0 to 1999 | 1 | ±(0.5%+2d) |
| ATC Temperature Probe 840038 (for use with pH) | Temperature °F | 32 to 40 | 0.01 | ±1.5 |
| Temperature °C | 0 to 60 | ±0.8 | ||
| ATC Conductivity / TDS / Salinity Probe 850081C/TD | µS | 0 to 200 | 0.1 | ±(2% fs + 1 d) |
| mS | 0.2 to 2.000 | 0.001 | ||
| 2 to 20 | 0.01 | |||
| 20 to 200 | 0.1 | |||
| PPM | 0 to 132 | 0.1 | ||
| 132 to 1,320 | 1 | |||
| 1,320 to 13,200 | 10 | |||
| 13,200 to 132,000 | 100 | |||
| % Salinity | 0 to 12 | 0.01 | 0.5% | |
| Pt Glass Low Conductivity Probe 850081C/SG | µS | 0 to 200 | 0.1 | ±(2% fs + 1 d) |
| ATC DO Probe 850081DO | DO | 0 to 20 mg/L | 0.1 | ±0.4 |
| O2 in Air | 0 to 100.0% | ±0.7 | ||
| Temperature °F | 32 to 122 | ±0.8 | ||
| Temperature °C | 0 to 50 | ±1.5 | ||
Benchtop Water Quality Meter
Reads pH, ORP (oxygen reduction potential), mV, conductivity, TDS (total dissolved solids), salinity and temperature
Rugged housing with large LCD displaying the parameter being measured together with time, date and temperature (in °C or °F). Operates on AC voltage (no batteries). Comes ready to use with ATC conductivity and pH electrodes, multiple electrodes holder arm, AC adaptor, computer cable, and software. Also accepts any pH or ORP probe with a standard BNC connector. EPA Equivalency Method: 120.1 and Alpha Method 2580.1992.
- Automatic or manual temperature compensatio
- Automatic or manual ranging
- N.I.S.T. buffer recognition
- Digital and analog outputs
- Min/Max and 99 data points
- Data Hold
- 5 calibration points
- Electrode status indication
Dimensions: 8½” × 7″ × 2¼” (216 × 178 × 57 mm)
Dimensions with Holder Arm: 10″ × 8″ × 9″ (254 × 203 × 229 mm)
Weight: 18.7 oz (530 g)
| Unit of Measure: | Range: | Resolution: | Accuracy: |
| pH: | 0 to 14 | 0.01 | ±0.02 pH |
| mV/ORP: | -1999 to +1999 | 0.1 mV -199.9 to +199.9 (otherwise 1 mV) | ±0.2 mV -199.9 to +199.9 (otherwise ±2 mV) |
| Conductivity μS/cm: | 0 to 19.9 0 to 199.9 0 to 1999 | 0.01 0.1 1 | ±1% fs + 1d |
| Conductivity mS/cm: | 0 to 19.99 0 to 199.9 | 0.01 0.1 | |
| TDS ppm: | 0 to 19.99 0 to 199.9 0 to 1999 | 0.01 0.1 1 | |
| TDS ppt: | 0 to 19.99 0 to 199.9 | 0.01 0.1 | |
| Salinity ppt: | 0 to 11.38 0 to 80 | 0.01 0.1 | 1% fs+1d |
| Temperature ºF: | 23 to 176ºF | 0.1 | ±0.9ºF |
| Temperature ºC: | -5 to 80ºC | 0.1 | ±0.5ºC |
Benchtop pH-mV Meter - 0 to 14 pH Range
Rugged housing with large LCD displaying the parameter being measured together with time, date and temperature.
- Automatic or manual temperature compensation
- Automatic or manual ranging
- N.I.S.T. buffer recognition
- Digital and analog outputs
- Min/Max and 99 data points
- Data Hold
- 5 calibration points
- Electrode status indication
Operates on AC voltage (no batteries). Comes ready to use with ATC pH electrode, electrode holder arm, AC adaptor, computer cable and software. Also accepts any pH or ORP probe with a standard BNC connector.
Dimensions: 8½” × 7″ × 2¼” (216 × 178 × 57 mm)
Dimensions with Holder Arm: 10″ × 8″ × 9″ (254 × 203 × 229 mm)
Weight: 18.7 oz (530 g)
| Mode: | Range: | Resolution: | Accuracy: |
| pH: | 0 to 14 pH | 0.01 pH | ±0.02 pH |
| mV/ORP: | -999 to 999 mV | 0.1 mV (-199.9 to 199.9) otherwise 1 mV | ±0.2 mV (-199.9 to 199.9) otherwise ±2 mV |
| Temperature ºF: | -23 to 176ºF | 0.1ºF | ±0.9ºF |
| Temperature ºC: | -5 to 80ºC | 0.1ºC | ±0.5ºC |
