EasyFerm Plus PHI pH Sensors

Hamilton CompanySKU: 238633-1213


Includes GST

Available to Order


Accuracy and longevity at your fingertips.

Whether a retrofit or a new installation, EasyFerm Plus PHI pH sensors come with industry standard electrical connector options and temperature compensation. If connecting to a controller, a wide variety of adapter cables are available to mate with any device.

Only Hamilton Company has specialised membrane glass for biopharma applications. PHI glass offers high chemical robustness and very little shift aftere repeated autoclave and SIP sterilisations. The Phermlyte electrolyte paired with a pre-pressurised reference and the HP Coatramic diaphragm delivers constant electrolyte flow, resulting in drift free measurement for hte life of the sensor.

Traditional sensors offer a standard mV signal that works with existing bioreactors and transmitters. Arc sensors can be connected directly to the control system through 4-20mA or digital signals. Memosens sensors are fully compatible with all existing Memosens transmitters on the market.


a-length 120mm, 225mm, 325mm, 425mm
Electrical Connector S7/S8, K8, VP6, Arc, Memosens
Measurement Principle Combination electrode; pH potential measured against reference
Measuring Range pH 0 to 14
Sensitivity 57 to 59 mV / pH at 25 °C
Zero Point 0 ± 20 mV
pH Glass Hamilton Type PHI Glass
pH Glass Resistance Moderate
Membrane Shape Spherical
Diaphragm HP-Coatramic
Number of Diaphragms 1
Electrolyte Pressurized Phermlyte
Reference System Hamilton Everef-F, Silver ion barrier included
Liquid Earth No
Temperature Sensor Arc - Yes, Memosens - Yes, VP6 - Pt100/Pt1000, K8 - No, S7/S8 - No
Diameter 12 mm
Process Connection PG13,5
Wetted Parts Glass
EPDM (Ethylene propylene elastomer)
O-ring Material FDA 21 CFR 177.2600; EG 1935/2004; USP <87>; USP <88> Class VI (121 °C)
Serial Number Yes
Recommended Storage Hamilton Storage Solution or 3 M KCl
Certificate Yes, with measured values in Buffer pH 4.01 and pH 7.00
Autoclavable Yes
Steam Sterilizable Yes
Operating Temperature Range 0 to 140 °C
Sample min Conductivity 100 µS/cm
Pressure Range bar g 0 to 6 bar


Specific Arc sensor specifications

Analog Interface 1 4-20 mA for pH, programmable
Analog Interface 2 4-20 mA for Temp., programmable
Analog Interface 1 and 2 Galvanically not isolated; pulse width modulation 3.5 kHz
Digital Interface RS485 Modbus (max. 31 addresses)
Configurable Values pH: pH, mV; Temperature: °C, K, °F
Temperature Sensor NTC22 kOhm
Baud Rate 4800, 9600, 19200, 38400, 57600,115200 bd
Operating Voltage 7 to 30 VDC max. 150 mW

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