ORP (Oxidation Reduction Potential) measures a system’s relative state for gaining or losing electrons. ORP values are affected by all oxidizing and reducing agents, not just acids and bases that influence pH measurement. In practice, ORP measures the ability of a lake or river to break down waste products, like contaminants and organic matter. When the ORP value is high, there is lots of oxygen present in the water.
Large Display ORP Pen
For ORP (Oxygen Reduction Potential) measurement in water treatment, disinfection and labs.
Highly stable and accurate readings with a large LCD display. Designed for simple one-hand operation. Features auto power off, hold function, and a low battery indicator. The case is IP65 waterproof, and will float if accidentally dropped into the water. Comes with 4 button-cell batteries and a built-in probe with protective cap.
- For ORP (Oxygen Reduction Potential)
- IP65 Waterproof
- Floats
- Easy to carry, simple to operate
| Range: | Resolution: | Accuracy: |
| -999 to 999 mV | 1 mV | ± 4 mV |
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 |
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)
Water Quality Meter pH Kit – Item #850086
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
Kit Dimensions: 11″ × 9½” × 2″ (279 × 241 × 51 mm)
| 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 | ||
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 |
pH Datalogger Kit
pH SD Card Logger Kit reads pH, ORP and Temperature, and includes everything necessary for immediate field use.
Kit Contains:
- pH SD Card logger #850060
- Sealed epoxy body reference combination electrode with a BNC connector
- <2½ foot cable
- ATC temperature probe
- Batteries and instructions
- Hard-shell foam-lined case
All components fit in the slim but protective hard-shell foam-lined case.SD Card Data logger allows for uploads pre-formatted data to Excel without the need for additional software.
| 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 |
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 |
AquaShock pH / ORP Meter Kit
AquaShock meters have been designed and tested to ensure accurate, reliable water quality measurement under any conditions.
Results are easy to read, in any light, on the large LED backlit display. Powered by a long-lasting, rechargeable Lithium-Ion battery. Aqua Shock meters are very intuitive and include all the functions you will likely ever need, including: review of 99 memories (min/max/ave) directly on the meter’s display, internal clock and calendar, temperature in °C or °F, auto-ranging, automatic and manual temperature compensation, and hold.
- Measures pH, mV & ORP (Oxygen Reduction Potential) and temperature
- 5 calibration points
- Automatic buffer recognition
- Recalls electrode offset, slope and last calibration
Includes Aqua Shock pH/ORP Meter; ATC pH probe; AC adaptor; manual; warranty card; probe input covers; pH 4, 7, 10 & deionized water; protective, foam-lined, hard-shell carrying case. NOTE: Aqua Shock ORP Probe (850064P) is sold separately. Aqua Shock is virtually unbreakable, eliminating the inconvenience of frequent instrument repair or replacement for at least 5 years of uninterrupted, accurate, reliable use.
- Shockproof
- IP67 Waterproof
- Floats
- Also accepts standard BNC probes
- Rechargeable Lithium-Ion battery
- Protective soft-grip outer layer
Meter Dimensions: 7¾” × 3¾” × 2¾” (197 × 95 × 70 mm)
Meter Weight: 1 lb (454 g)
Kit Dimensions: 13½” × 11¼” × 3″ (343 × 286 × 76 mm)
