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ALpHA® Laboratory pH Electrodes
Combination Electrodes, Sensing and Reference Half Cells
PHE-2171
PHE-2161
PHE-2191
PHE-2291
PHE-3111
PHE-3211
PHE-3711
All models shown smaller than actual size.
To Order Visit omega.com/phe2100_2700_3000_9900 for Pricing and Details
Temp R @ 25ºC
Model No. Length Diameter Range (77ºF) Reference
BNC Application/Features mm (inch) mm (inch) ºC (ºF) MΩ Type
Combination Electrodes
PHE-2171 ** Refillable glass flat surface electrode with annular
ceramic liquid junction for measurement of meats 0 to 100
or agar plates 110 (4.3) 12 (0.47) (32 to 212) 300 Ag/AgCl
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PHE-2161
liquid junction for soil pH measurement 0 to 100
(includes instructions) 110 (4.3) 12.(0.47) (32 to 212) 150 Ag/AgCl
PHE-2191
ceramic junction for difficult samples (slurries, 0 to 110
emulsions, high-purity water) 110 (4.3) 14 (0.55) (32 to 230) 100 Ag/AgCl
PHE-2291
junction flow rate 110 (4.3) 14 (0.55) (32 to 230) 100 Ag/AgCl
Reference Half Cells
PHE-3711 Refillable glass electrode with ceramic double junction 0 to 100 Ag/AgCl
reference half cell 150 (5.9) 12 (0.47) (32 to 212) – Double
PHE-3111 Refillable glass electrode with ceramic junction 0 to 100 Ag/AgCl
general purpose reference half cell 150 (5.9) 12 (0.47) (32 to 212) – Ceramic
PHE-3211 Refillable glass electrode with ceramic double junction 0 to 100 Ag/AgCl
reference half cell with 10% KNO3 salt bridge 110 (4.3) 12 (0.47) (32 to 212) – Double
PHE-3217 Refillable epoxy electrode with PTFE double 0 to 100 Ag/AgCl
junction reference for difficult or dirty solutions 127 (5.0) 12 (0.47) (32 to 212) – Double
Comes complete with 0.75 to 1 m (2.5 to 3') of cable and electrode care operator’s manual.
For US standard connector add suffix, “-U” to model number for additional cost.
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pH range 0 to 13
**
pH range 0 to 12
Ordering Examples: PHE-3111, general purpose reference half cell with BNC.
PHE-3217-U, PTFE double junction reference cell with US Standard connector.
Refillable glass electrode with annular ceramic
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Refillable glass electrode with high flow rate
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Refillable glass electrode with ceramic high double 0 to 110
C-19
For Sales
& Service
U.S.A. and Canada
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