Pre-Pressurized pH and ORP Probes
Pre-pressurized pH and ORP probes are specifically targeted at the demanding needs of bioprocess industries such as upstream and downstream pharmaceutical, food, beverage, and brewing. The EasyFerm family has multiple glass pH membrane types to withstand autoclavation, SIP and CIP cleaning.
EasyFerm Plus
EasyFerm Bio
EasyFerm ORP
What makes pre-pressurized sensors different?
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Pre-Pressurized Reference
6 bar of internal pressure ensures that contaminants from the process liquid cannot easily enter the sensor.
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Everef-F reference system
The Everef-F system uses a silver scavenger and a diffusion barrier to block Ag+ ions. This ensures stable measurement, less cleaning and longer sensor life in biopharma applications.
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HP Coatramic Diaphragm
This specially designed porous diaphragm works in combination with the electrolyte to form a non-stick coated surface that greatly reduces clogging by external particulates.
EasyFerm Plus vs. EasyFerm Bio?
Both EasyFerm Plus and EasyFerm Bio sensors utilize Hamilton's pre-pressurized reference design. Which product to use is dependent on your application needs.
EasyFerm Plus Sensors
- Best for biopharmaceutical processes that require SIP or autoclavation
- Extremely low drift after repeated sterilization cycles
- Everef-F reference design prevents clogging in high protein environments
- PHI glass membrane recommended
EasyFerm Bio Sensors
- Best for food, beverage, and biopharmaceutical applications with CIP cleaning
- Biocompatible Foodlyte electrolyte
- EHEDG sanitary certification
- HB glass membrane recommended for fast response after CIP
Specifications
| EasyFerm Plus | EasyFerm Bio | EasyFerm Plus ORP | |
|---|---|---|---|
| Parameter | pH | pH | ORP |
| Measuring Range | 0 - 14 pH | 0 - 14 pH | ± 2000 mV (Arc: ± 1500 mV) |
| Process temperature | 0 – 140 °C (Arc: analog 0 – 110 °C, digital 0 – 140 °C) | 0 – 140 °C (Arc: analog 0 – 110 °C, digital 0 – 140 °C) | 0 – 140 °C (Arc: analog 0 – 110 °C, digital 0 – 140 °C) |
| Pressure range | 0 – 6 bar | 0 – 6 bar | 0 – 6 bar |
| Hygienic aspects | Autoclavable, CIP, SIP | Autoclavable, CIP, SIP | Autoclavable, CIP, SIP |
| Sensing element | PHI Glass (preferred) | HB Glass (preferred) | Pt ring |
| Electrolyte | Phermlyte | Foodlyte | Phermlyte |
| Reference system | Everef-F | Everef-F | Everef-F |
| Diaphragm | HP Coatramic | HP Coatramic | HP Coatramic |
| O-ring | EPDM | Silicone | EPDM |
Download our pH Measurement Guide
Get a better understanding of pH measurement in Hamilton’s comprehensive pH Measurement Guide. This 68-page booklet is intended for anyone with an interest in pH sensor technology or anyone who needs to implement pH sensors in controlled environments such as laboratories and industrial plants. The guide covers the following essential topics:
- Definition of pH scale
- The NERNST equation
- The pH measurement system and measurement chain characteristics
- Applications, calibration, and maintenance of Hamilton's pH sensors
Resources
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Brochure - BioPharma
Innovative solutions for process analytics in biotechnological and pharmaceutical industries. -
Brochure - Arc Intelligent Sensors
Arc Intelligent sensors offer a new way to connect to your process control system. -
Brochure - Brewery
Learn about our control and analytical solutions that are essential to the brewing process.
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What is a pre-pressurized sensor and why would I choose it?
The electrolyte within the sensor is pressurized at the factory. This feature helps prevent against clogging and poisoning of the sensor due to the process liquid. The design is hygienic and well suited for fermentation applications found in biopharma, food, and beverage markets. -
What is the expected lifetime of my pH sensor?
Expected pH sensor lifetime is dependent on the application. Exposure to strong chemicals, elevated temperature, fluctuating pressure, and solid build-up can all impact the sensor life. As the sensor ages, a sluggish response may become more apparent, and will require more frequent calibrations to compensate for this change. The overall health of the Arc pH sensors can be seen using the quality indicator in ArcAir software. Click to learn more about sensor lifespan and expiration in the Knowledgebase article. -
What solution should I store my pH or ORP probe in?
Hamilton recommends storing pH and ORP probes wet in either Hamilton Storage Solution (Ref 238931) or in 3M KCl solution. Click to see the pH/ ORP Sensor Storage and Regeneration Knowledgebase for more information.
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pH and ORP Sensor Installation Tips
This brief article describes some common considerations with sensor installation and removal, as well as best practices for mounting. -
pH and ORP Sensor Cleaning
Answers to common questions on how to clean off build-up and coating on pH sensors and ORP sensors. -
pH Glass Membrane Types
Hamilton offers several different options for pH membrane glass. This article describes the purpose of each glass type.
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