TrupH reusable 12mm pH electrodes are designed for improved performance and reliability in cell culture and fermentation applications.TrupH sensors offer better measurement repeatability, low drift, and a rapid response time. The reference electrode is designed to minimize fouling even in high cell-density bioprocesses.

A pH electrode includes the reference and sensing electrodes, an optional temperature sensor, and an electrical connector. For a given transmitter, the pH electrode can be replaced. The pH electrode can be separated from the cable and transmitter for sterilization. Insertion lengths of 120, 225, 325 or 425 mm are available.


  • Fast response
  • Highly repeatable
  • Proven reliability
  • Suitable for autoclave, SIP and CIP
  • Certified “Like for Like” replacement for Broadley-James/ Mettler-Toledo (Ingold)

pH / DO Dual External Transmitter

1056 133X134

Dual External

The pH / DO dual external transmitter is a remote pipe or panel mounted instrument which is designed for the simultaneous measurement of pH and dissolved oxygen (DO) using sterilizable sensors. Finesse TrupH / TruDO sensors are plug-and-play with this transmitter. The transmitter prompts the user to configure each sensor loop in a few quick steps for immediate deployment. The transmitter also continuously monitors itself and the sensor for faults or errors, and provides easily recognizable alarm information to the control system or diagnostics on its screen. Its outputs are two 4 to 20 mA or 0 to 20 mA current signals that are electrically isolated and earthed (grounded). The external transmitter is the perfect solution for system retrofits.

Local Languages: The Finesse External Transmitter offers seven local languages: English, French, German, Italian, Spanish, Portuguese, and Chinese. Every unit includes user programmable menus, calibration routines, faults, and warnings; user help screens appear in all seven languages. The displayed language can be easily set or changed using the menus.


TruSens Transmitter

Trusens Transmitter 100X169

TruSens TX

TruSens blades (or digital transmitters) are mounted in a Finesse bioreactor controller and do not have a display or keypad. All blades provide automatic input of calibration data. The Virtual Transmitter module in Finesse TruBio® software allows full access to all of the blade’s functions, simulates a physical transmitter, and adds alarms and connectivity monitoring capability.




Sensor housing

TrupH and TruDO housings are designed to protect traditional 12mm pH and DO sensors when they are used in stainless steel bioreactors or fermentors. These housings are manufactured using 316L stainless steel and only use FDA approved wetted materials (e.g., o-rings). Finesse housings offer a standard PG 13.5 threaded insert for 12 mm sensors as well as a selection of interfaces with standard Ingold, B. Braun safety and sanitary ports.


pH Buffer Solutions

Our pH buffer solutions provide traceability to international standards. They also offer the advantages of high stability, easy handling, and long shelf-life.


Cable Connectors

D4cable 133X67

Custom cable lengths

TruCables™ are designed to securely connect sensors and transmitters and provide higher repeatability, increased signal stability and reduced noise in measurement signals. The cables are available with a variety of standard connectors and are also compatible with sensors made by other manufacturers. TruCables can be used in all bioprocess applications and vessel types.

pH Sensors Specifications





Measurement Electrochemical Electrochemical Electrochemical
Range 0–14 pH 0–14 pH 0–14 pH
Max Precision 2-12 pH 2-12 pH 2-12 pH

0° to 135°C
32° to 275°F

0° to 135°C
32° to 275°F
0° to 135°C
32° to 275°F
Pressure 6 bar
87 psi max
6 bar
87 psi max
6 bar
87 psi max
Connection PG 13.5 PG 13.5 PG 13.5
Connector Type K8 S8 VP6
Sensor Length 120mm / 4.7 in 120mm / 4.7 in 120mm / 4.7 in
  225mm / 8.9 in 225mm / 8.9 in 225mm / 8.9 in
  325mm / 12.8 in 325mm / 12.8 in 325mm / 12.8 in
  425mm / 16.7 in 425mm / 16.7 in 425mm / 16.7 in
 Cable Length 1,8 m / 6 ft 1,8 m / 6 ft 1,8 m / 6 ft
  6 m / 20 ft 6 m / 20 ft 6 m / 20 ft
Wetted Material Glass Glass Glass



Wetted Materials 316L stainless steel
Sensor Connection PG 13.5
Port Connections Standard, safety and 1½ in sanitary
Pressure 6 bar / 87 psi
Insertion Guarded and unguarded


Dual pH / DO Transmitter

Physical Description

Case Material Polycarbonate
Rating NEMA 4X/CSA (IP65)
Dimensions (H x W x D) Overall: 155 x 155 x 131 mm / 6.10 x 6.10 x 5.15 in Cutout: 1/2 DIN 139 x 139 mm / 5.45 x 5.45 in
Mounting Remote, panel or pipe mounted (kit included)
Conduit Openings Accepts 1/2 in or PG 13.5 conduit fittings
Display Monochromatic graphic LCD, 128 x 96 pixel display resolution Display area: 58 x 78 mm / 2.3 x 3 in
Weight / Shipping Weight 1.5 kg / 2 kg (3 lbs / 4 lbs)


Power supply 20-30 VDC @ 15 W
Signal outputs 2x Isolated analog 4 to 20mA
Output accuracy ±0.05 mA
RFI/EMI EN-50081/ EN-50082/ EN-61326
Operating Temperature 0° to 55° C / 32° to 131° F
Storage Temperature 0° to 60° C / 32° to 140° F
Relative Humidity 5% – 95% (non-condensing)

TruFluor pH

TruFluor™ pH sensors, designed for single-use applications, combine USP Class VI materials with a patented optical design to maximize stability, minimize drift, and provide superior performance.