
General Purpose 1⁄2 MNPT pH Sensor
Dimensions: mm (inch)
PHE-7357-10
Applications
U Potable Water Supplies 
U Cooling Towers 
U Fresh and Salt Water Aquariums 
U Secondary Treated Waste Water
The PHE-7357 sensor is designed for use in 
most water and waste water applications.  
The large reservoir of reference electrolyte, 
coupled with the non-fouling nature of the  
Porous PTFE liquid junction, assures a long 
life in general service.
The sensor body reduces the risk of accidental 
breakage during installation and maintenance 
by the inclusion of protective lobes around 
the sensing element. Also available for ORP 
measurement.
Use of the high temperature version is 
recommended where service temperatures  
exceed 80°C (176°F).
PHE-5551 is a double-junction construction 
with solution ground in a robust PPS housing, 
being highly resistant to electrode poisoning 
solutions. Standard on these elctrodes is a 
110°C (230°F) rating.
Specifications
pH Range: 0 to 14 pH 
Temperature Range: 
0 to 80°C (32 to 176°F) (standard) 
0 to 110°C (32 to 230°F) (high temperature)
Pressure Range: 0 to 100 psig 
Accuracy: ±0.1% over full range 
Impedance: 80 MΩ (standard version) 
150 MΩ (high temperature version) 
Reference Cell: 
Single junction, KCl/AgCl
Reference Junction: Porous PTFE 
Wetted Materials: 
PPS, PTFE, glass, 316 SS 
Response Time:  
95% of reading in 10 seconds
Drift: Less than 2 mV per week
½ NPT
140 
(5.50) 
½ NPT
16.5 
(0.650) 
12.2 
(0.480) 
PHE-7357
PHE-7357-10
PHE-5551-10
Both shown smaller 
than actual size.
 To Order Visit omega.com/phe735710_555110 for Pricing and Details
 Model No.  Description
 PHE-7357-10-( 
 PHE-5551-10-(*)  General purpose pH sensor with solution ground 
 ORE-7357-10  ORP probe for clean water 
 ORE-5551-10  ORP probe for clean water with solution ground
Comes complete with 3 m (10') cable and operator’s manual. Non standard cable lengths available 
for additional cost.
* Specify ATC sensor for PHE-5551-10-(*) only: “-PT100” for 100 Ω Pt RTD or “-PT1K’ for  
1000 Ω Pt RTD, for additional cost.
Ordering Examples: PHE-5551-10-PT1K, general purpose sensor with 
1 KΩ Pt RTD ATC and 3 m (10') cable.
ORE-5551-10, ORP electrode.
Option Code (For Additional Cost)
 Order 
 Suffix Description
 -HF  HF/Fluoride resistant
 -HT  High temperature reference cell, standard on PHE/ORE-5551
)  General purpose pH sensor
*
1
⁄2 MNPT pH sensor with 
D-39
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