What Is a Toco Transducer?

A tocodynamometer, commonly called a toco, is an external uterine activity sensor used during labor and delivery to detect, time, and record uterine contractions. Strapped to the maternal abdomen with a monitoring belt, the toco transducer responds to changes in abdominal wall tension caused by uterine contractions, transmitting data to the fetal monitor to display contraction frequency, duration, and relative intensity in real time. It is one of two transducers used in standard external fetal monitoring — the other being an ultrasound transducer that tracks the fetal heart rate.

GE Corometrics 2264HAX — Knob (Button) Style

The 2264HAX is GE Healthcare’s Corometrics Nautilus-series toco transducer featuring a knob (button) style proximal connector. Rather than a sliding loop, the knob threads into a corresponding receptacle on the monitoring belt, creating a secure, twist-lock attachment that many clinicians prefer for its positive engagement feel. Like the loop-style 2264LAX, the 2264HAX uses the same flat, low-profile housing designed to minimize patient discomfort during prolonged abdominal monitoring, and shares the same watertight construction for thorough between-patient disinfection.

This compatible replacement transducer performs the same clinical role as the OEM unit at a more accessible price point, allowing facilities to maintain adequate transducer inventory without single-source supply constraints. It ships individually bagged, non-sterile and ready for immediate clinical use.

Wings vs. Knob — Choosing the Right Style

GE Corometrics offers the Nautilus toco in two attachment styles that are otherwise electrically and functionally identical. The wings (loop) style transducer — OEM part number 2264LAX — uses a sliding loop that snaps into the belt quickly, which some clinicians prefer for speed during fast-paced admissions. The knob (button) style transducer — OEM part number 2264HAX — uses a threaded knob that many staff prefer for the secure, locked feel it provides once attached. Both styles use the same 12-pin keyed connector and are compatible with the same range of GE Corometrics monitors. The choice between them is largely a matter of departmental preference or established workflow. IPR Medical stocks both styles — contact us if you need help deciding which is right for your unit.

Monitor Compatibility

This compatible toco transducer is designed for use with GE Healthcare Corometrics fetal monitors that accept a round, keyed 12-pin connector. Compatible models include the 116, 118, 120, 128, 129, 130, 145, 150, 151, 155, 170, 171, 172, 173, 174, 250, 250cx, 256cx, 259, 259cx, and 340 series. If you are unsure whether this transducer is compatible with your specific monitor configuration, contact IPR Medical before ordering — our team can confirm compatibility based on your monitor model.

Safety and Materials

This transducer is latex-free and DEHP-free, supporting use in facilities with latex-sensitivity protocols. It is non-sterile and is not intended for invasive use. The unit carries FDA, CE, and TUV certifications and meets ISO 10993-1, 5, and 10:2003E biocompatibility standards, as well as RoHS compliance. These certifications confirm that the materials used in construction have been evaluated for patient contact safety.

IPR Medical — Your Source for Fetal Monitor Accessories

IPR Medical stocks compatible toco transducers for GE Corometrics fetal monitors, including both the 2264HAX knob configuration and the 2264LAX wings configuration, so your labor and delivery department can replace worn or damaged transducers quickly without extended lead times. Whether you need a single replacement or are stocking multiple units across a busy OB unit, IPR Medical can fulfill your order and answer compatibility questions before you buy.

IPR Medical stocks compatible GE Corometrics 2264HAX toco transducers. Contact us at 855-477-8866 or cs@iprmed.com.