Blood oxygen sensor connector requirements for monitors

PT Series Connectors Catalog Types, Ratings, Termination

Key Requirements for Blood Oxygen Sensor Connectors in Patient Monitors

When selecting a connector for the blood oxygen sensor of a patient monitor, the primary decision factors are miniaturization, low power consumption, signal integrity, and patient safety. The connector must fit within the compact sensor housing, operate reliably on battery power, and preserve the weak physiological signal without introducing noise.

Core Electrical and Mechanical Specifications

• Miniaturized footprint: The connector volume should be less than 15mm × 15mm to fit inside the sensor enclosure without adding bulk.
• Low power operation: Current draw should be ≤1mA to remain compatible with monitor battery power supplies, supporting a battery life of at least 8 hours.
• Low noise performance: A signal-to-noise ratio of ≥70dB is required to capture the weak blood oxygen signal accurately and avoid false readings.

Recommended Connector Series and Construction

The HR10 series is a suitable medical-grade choice for this application. It features a 4-pin configuration and a shell made of medical-grade polycarbonate (PC). This material is free of extractables and complies with ISO 10993 biocompatibility requirements, making it safe for prolonged skin contact.

Contact Plating and Environmental Protection

Contacts are plated with pure gold, which is hypoallergenic and helps prevent skin irritation in patients with sensitivities. The connector also carries an IP65 protection rating, providing resistance against sweat and dust ingress during routine clinical use.

Selection Notes for Engineers and Buyers

Verify that the connector's pin count and mating interface match your sensor PCB layout and cable assembly. Confirm the operating temperature range and mating cycle life against your device's expected service conditions. For applications requiring similar compact, low-noise connections, review the connector selection guidance for ventilator airflow control modules or the HR25 series medical connectors used in surgical robot joint control.