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Combination Style Industrial pH Electrodes

Industrial Electrodes


Item# ORE-5311-10

In stock

Lead Time (If not in stock): 5 weeks
Industrial Electrodes ORE-5311-10 ORE-5311-10
  • 16 Month Shelf Life
  • Rugged Contruction
  • Insertion/Submersion and In-Line Disposable Electrodes

ORE-5311-10 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Measurement Type
Wetted Materials
Max Temperature
Process Connection Type
Process Connection Size

Insertion/Submersion Combination Electrodes
The PHE-7151 series combination electrodes are ruggedly constructed; the outer body is ABS with 3/4" MNPT threads at both ends. The maximum insertion length is 31.75 mm/1.25". Electrodes are annular PTFE liquid junction refillable and include 15 ft of cable with a BNC connector. For applications with temperatures up to 120°C (248°F), units are available in polyphenylene sulfide (PPS).***

These electrodes have a special plunger design allowing them to be mounted at any angle.

Part No. Length
or Gel
R (megohms)
at 25°C/77°F
PHE-7151-15140/5.530/1.20 to 120 to 80Refill400Refillable general purpose**
PHE-7351-15140/5.530/1.20 to 120 to 80Gel400Sealed general purpose
PHE-7152-15140/5.530/1.20 to 140 to 80Refill1000Refillable high pH applications**
ORE-7151-15140/5.530/1.20 to 80RefillGeneral purpose refillable ORP**
** Refill Solution: PHFS-7151-4, 4 oz bottle; PHFS-7151-16, 16 oz bottle
***For polyphenylene sulfide body, add suffix “-PPS” to part number and $50 to price

In-Line Disposable Electrodes
OMEGA™ in-line combination electrodes mount on standard pipe tees for continuous pH or ORP monitoring. The electrode is constructed in a PVDF housing with 1/2" MNPT threading. Probe insertion length is 25 mm (1") and is able to withstand pressure up to 150 psi. Three-meter (10-ft.) cable length and BNC connector are standard. Dimensions: 127 x 25 mm (5 x 10")


CPVC In-Line Disposable pH Electrodes
Also available, the CPVC In-Line Disposable Electrode is ruggedly constructed to withstand up to 100 psi. Probe insertion length is 51 mm (2") with 3/4" diameter. A 3/4" MNPT fitting is standard and is supplied with 3 m (10 ft.) of cable and a BNC connector. Dimensions: 168 x 25 mm (6.6 x 10")


Part No. ph Range Temperature
Range °C/°F
Notes R Megohms
at 25°C/77°F
APHE-5311-100 to 135 to 100/23 to 212General purpose50
APHE-5312-100 to 140 to 100/32 to 212High pH200
APHE-5411-100 to 135 to 100/23 to 212Double junction50
APHE-5412-100 to 140 to 100/32 to 212Double junction high pH200
AORE-5311-10ORP5 to 100/23 to 212Platinum band
AORE-5411-10ORP5 to 100/23 to 212Platinum band double junction
AORE-5419-10ORP5 to 100/23 to 212Gold disc double junction
for cyanide applications
BPHE-5316-100 to 13-5 to 80/23 to 176Sealed Ag/AgCl50
Automatic Temperature Compensation is not required with ORP (Redox) electrodes.
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Rated 5 out of 5 by from Easy pH electrode replacement Easy replacement works great. Just unscrewed the old one and put this one in. Starting working immediately.
Date published: 2022-08-30
Rated 5 out of 5 by from Great Product with awesome delivery Product performs as advertised and was delivered in a timely fashion!
Date published: 2016-09-02
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What is the expected service life for a PHE-7351-15-HF? The probe is mounted in a half inch process cooling water line using a T union. There is approximately 2LPM of DI water flowing across the probe face.

Asked by: Scotchy
Thank you for your question? pH electrodes are fragile and have a limited life span. The general shelf life of a pH probe is 1 year however how long an electrode will last is determined by how well the probe is maintained and the pH application. The harsher the system, the shorter the lifespan.
Answered by: application engineer je
Date published: 2019-07-01

Are these compatible with Rosemount 5081 & 3081 transmitters?

Asked by: HNewman
Thank you for your inquiry about the pH probes. Omega's pH probes have a standard BCN connector and if the transmitter in question have it as well, then, yes. If not, unfortuanately, they ar enot compatible.
Answered by: Application Engineer JC
Date published: 2022-01-28

Is this model able to a process with sulfuric acid and caustic soda? What are the connectors of ATC and PH in this model?

Asked by: AlexCM
Thank you for your inquiry! This probe will be compatible with sulfuric acid and caustic soda. The probe has a BNC connector for the pH portion and lead wires for the ATC.
Answered by: Application Engineer JM
Date published: 2022-01-27
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