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pH ELECTRODES
pH Electrodes
OMEGA’s glass-bodied, refillable
(RF), combination pH electrodes are
for general purpose laboratory
measurements. The inert nature of the
glass body allows these electrodes to
be used in aqueous and non-aqueous
solutions at temperatures up to 110°C (230°F).
The PHE-1479 has a ceramic liquid junction and a saturated potassium chloride electrolyte. This electrolyte is a laboratory standard
and is suitable for most measurements.The ceramic junction has a low flat rate which minimizes sample contamination from the
potassium chloride solution.
The PHE-1478 has a Porous Teflon®liquid junction and a saturated potassium chloride electrolyte. The Porous Teflon®liquid junction
provides a stable, non-fouling reference contact ideal for the most demanding applications.This research grade electrode should be
used when the sample has a very low or very high ionic strength, where greases or oils are present, or in biological solutions containing
TRIS or large amounts of protein.
To Order
(Specify Model Number)
Model No. Price Description
PHE-1478 $60 Teflon®liquid junction
PHE-1479 65 Ceramic liquid junction
ES-2207 99 Reference Book: Handbook of Water and
Wastewater Treatment Technologies
Comes with complete operator’s manual.
Note: 1 m (3') of cable length is standard, for add’l length consult engineering.
Ordering Example: PHE-1478, Teflon®liquid junction electrode, $60.
Specialty pH Electrodes
These specialty electrodes are designed
for surface and subsurface measurements
of semi-soft materials. The typical
applications include meats, cheese, dairy
products, photographic emulsions and
electrophoresis gels.
The PHE-1525 Flat style is a refillable
combination pH electrode with a polymer
body, Porous Teflon
®
liquid and a flat pH
glass membrane. It can be used to
measure the pH of any moist surface
or inverted and used as a “one-drop”
electrode. Samples as small as 100
microliters are easily measured with
this inverted technique.
The PHE-1526 Spear-Point is a
refillable combination pH electrode
with a 9.5 mm (0.37") glass body,
Porous Teflon
®
liquid junction and
pointed pH glass bulb. It is designed
for sub-surface measurements
of cheese, processed meats and
other soft materials. These
electrodes respond quickly
and are easily cleaned.
SPECIFICATIONS
pH Range: 0 to 14 pH
Temperature Range: -5 to 100°C
(23 to 212°F)
Accuracy: ±0.02 pH
Response Time: 95% of reading
within 5 seconds
Impedance: 60 MΩ at 25°C
Zero Potential: 7.0 ± 0.2 pH
Dimensions (L x D):
Flat:140 x 12 mm (5.5 x 0.47")
Spear-Point: 150 x 9.5 mm
(5.9 x 0.37")
SPECIFICATIONS
pH Range: 0 to 14 pH
Temperature Range: -5 to 100°C (23 to 212°F)
Accuracy: ±0.02 pH
Response Time: 95% of reading within 5 seconds
Impedance: 60 MΩ at 25°C
Zero Potential: 7.0 ± 0.2 pH
Dimensions (L x D): 140 x 12 mm (5.5 x 0.47")
To Order
(Specify Model Number)
Model No. Price Description
PHE-1525 $70 Flat surface pH electrode
PHE-1526 90 Spear-Point pH electrode
Comes with complete operator’s manual.
Note: 1 m (3') of cable length is standard;
for add’l length consult engineering.
Ordering Example: PHE-1525, flat surface pH electrode, $70.
PHE-1479, $65, shown smaller than actual size.
PHE-1526, $90, shown smaller than actual size.
MOST POPULAR MODELS HIGHLIGHTED!
Suffix Description Price
-D Double junction $50
-HF HF fluoride resistant body 50
-HT High temperature reference 30
-HPH High pH glass 30
-ORP Redox (ORP) measurement 35
Options available on PHE-1478, PHE-1479, PHE-1525, PHE-1526,
PHE-1523 and PHE-1524 electrodes.
Note: 1 m (3') of cable length is supplied standard;
for add’l length, consult Engineering.
Options for Combination Electrodes
PHE-1478
$
60
C-14
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Laboratory Electrodes
To Order
(Specify Model Number)
Model No. Price Description
PHE-3216 $60 Single junction pH junction
PHE-3216D 80 Double junction pH junction
Comes with complete operator’s manual.
Ordering Example: PHE-3216, single junction pH electrode, $60.
Laboratory Insertable Electrodes
Lab insertables are designed for pH
measurement inside narrow vessels. Small
volumes in test tubes or solutions in large
Erienmeyer casks can be conveniently
measured using one of these responsive
electrodes. The PHE-1523 is a glass-bodied,
refillable, combination pH electrode. The 5.0" insertion length allows measurement in test tubes or other narrow vessels. This electrode
features full span, fast response pH glass and high flow Porous Teflon®reference junction; making it a must for any laboratory.
SPECIFICATIONS
pH Range: 0 to 14 pH
Temperature Range:
-5 to 100°C (23 to 212°F)
Accuracy: ±0.02 pH with proper
calibration
Sodium Error: 0.05 pH in 0.1
Molar Na• ion at 12.8 pH
Response Time: 95% in 10
seconds, stable in 30 seconds
Impedance: 60 MΩ at 25°C
Zero Potential: 7.0 ± 0.2 pH
Dimensions (L x D): Micro:
190 x 12 mm (7.5 x 0.47")
SPECIFICATIONS
pH Range: 0 to 14 pH
Temperature Range: -5 to 100°C (23 to 212°F)
Response Time: Stable in 30 seconds
Resistance: Less than 1000Ω
Liquid Junction: Porous Teflon
®
Electrolytes:
Saturated Potassium Chloride-Silver
Screening Electrolyte: 8 Molar Potassium Nitrate
Dimensions (L x D): 140 x 12 mm (5.5 x 0.47")
To Order
(Specify Model Number)
Model No. Price Description
PHE-1523 $75 Glass body pH electrode
PHE-1524 70 Polymer body pH electrode
Comes with complete operator’s manual.
Ordering Example: PHE-1523, glass body pH electrode, $75.
Laboratory
Reference
Electrodes
The PHE-1524 is a sealed, polymer-bodied, 254 mm (10") long combination pH
electrode. The length allows measurements to be made in large, deep flasks or bottles.
This sensor has our full span pH glass and a gel-filled Silver Chloride reference using
the trouble-free Porous Teflon®liquid junction.
PHE-3216, $60, shown smaller than actual size.
PHE-1524, $70, shown smaller than actual size.
PHE-3216D, $80, shown smaller than actual size.
MOST POPULAR MODELS HIGHLIGHTED!
Laboratory procedures require the use of a separate reference electrode. Several standard methods and techniques for pH
measurement and most ion selective electrodes require the use of a “double junction” reference electrode. The PHE-3216 is an ideal
choice for this application. These gel-filled electrodes feature a replaceable Porous Teflon
®
liquid junction in a polymer body. They are
supplied ready to use with a saturated Potassium Chloride-Silver reference cell. The double junction version uses Potassium Nitrate as
the screening electrolyte although it can be easily replaced with the electrolyte of your choice. The large surface are liquid junction
provides a stable, low impedance contact to the solution assuring fast and accurate measurements. The chemically inert nature of
Teflon
®
makes the sensor difficult to foul and easy to clean.
Model No. Price Description
ES-2186 $125 Reference
Book:
Environmental
Monitoring
Handbook
Accessory
PHE-3216
$
60
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