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pH Meters
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pH Meters, continued
pH and Conductivity Meter, Benchtop
This affordable benchtop meter does it all—pH, mV, conductivity, total dissolved solids (TDS), salinity and temperature. Designed for student use with durable construction and easy operation, this meter is perfect for the teaching lab. Results measured together with time, date and temperature are easy to read on a large LCD display.
Features and Specifications:
• Range: 0–14 pH, ­1999–1999 mV, 0–1999 μS/cm, ­5–80 oC • Resolution: 0.01 pH, 0.1 mV, 0.01–1 μS/cm, 0.1 oC
• Accuracy: ±0.02 pH; ±0.2 mV; ±1% fs + 1d, ±0.5 oC
• Automatic or manual temperature compensation and ranging • Automatic buffer recognition
• Digital and analog outputs
• Min/Max and 99 data points • Data hold
• 5 calibration points
• Electrode status indication
Comes ready for use with ATC conductivity and pH electrodes, multi­ ple electrodes holder arm, AC adaptor, computer cable and software. Meter will accept any pH or ORP probe with a standard BNC connector. Dimensions: 81⁄2" x 61⁄2" x 21⁄4".
Flinn Desktop Digital pH Meter
pH and temperature readings are easy to adjust and
see on the large blue screen. The unit is easy to
calibrate and operate. The unit comes with a pH meter, rechargable pH composite electrode, electrode holder, power adapter, pH standard buffer solution and instruction manual.
Specifications:
• Measuring ranges: 0.00–14.00 pH range, 0–1999 mV, 0–60 °C
• Resolution: pH: 0.01, mV: 1 mV
• Accuracy: pH: ±0.02, mV: 0.1 mV–1 mV
• AC power supply (220 V)
• Dimensions (mm): 290 x 210 x 95
Flinn Benchtop Touchscreen pH Meter
A large LCD touchscreen provides easy­to­read pH
and temperature data. Unit is self calibrating and
performs experimental calculations. Includes pH meter, combined electrode, temperature electrode, electrode holder, pH standard buffer solution, USB interface, 12 V power adapter and instruction manual. Specifications:
• Measuringranges:­2.00–19.99pHrange,­1999–1999mV,­5.0–105.0°C • Resolution: pH: 0.01–0.001, Temperature: 0.01 °C
• Accuracy: pH: ±0.002, 0.1 mV–1 mV, ±0.2 °C
• Automatic and manual temperature compensation
• Able to store up to 200 data sets (printed and deleted)
• 5 calibration points
• Standard RS­232 and USB interface
• Dimensions (mm): 215 x 170 x 35
pH and Conductivity Meter, Benchtop AP7452
Catalog No.
Description
Price/Each
AP7452
pH and Conductivity Meter, Benchtop
$451.75
Flinn Desktop Digital pH Meter
AP9701
Catalog No.
Description
Price/Each
AP9701
Flinn Desktop Digital pH Meter
$519.45
Flinn Benchtop Touchscreen pH Meter
AP9702
pH METERS continued on next page.
Catalog No.
Description
Price/Each
AP9702
Flinn Benchtop Touchscreen pH Meter
$661.45
What is pH?
with a range of 0 to 14 pH units. The low end of the scale is acid, the high end alkaline, with pH 7.00 at the midpoint as neutral.
Each unit on the pH scale represents a tenfold difference in acidity level. For example, pH 4 is ten times as acidic as pH 5. A pH 3 solu­ tion has ten times the acidity level of a pH 4 solution and 100 times the acidity level of a pH 5 solution.
Understand pH
The pH scale represents the acidity or alkalinity of an aqueous solution. pH is defined as the negative logarithm of the hydrogen ion concentration of a solution. pH = –log[H+].
Absolutely pure water is the standard used in determining pH value. Since the pH scale is derived from the chemical properties of water, the scale cannot be used with non­aqueous solutions. The pH scale was established