What type of electrical connector does my sensor have?

The electrical connectors used on sensors can vary greatly. The following list describes the electrical connectors commonly found on Hamilton process sensors. See each connector type and learn where they are used to decide which one fits your needs.

Close-up of a cylindrical connector with gold-plated pin contacts and knurled metal coupling ring

VP (VarioPin)

This is a common connector used throughout the Hamilton sensor product line. VP is abbreviation for “VarioPin”. The VP designation often includes a number referring to the number of exposed poles on connector head. Example VP6 = 6 pole. VP connectors are fully autoclavable with IP68 protection rating.

Electrode connector with gold pin tip and hex nut fitting, side view

K8

K8 / K9 connectors are typically used on traditional pH / ORP sensors which lack temperature compensation. These connectors have a two pole design comprised of the center core and outer metallic threaded connection.

Black threaded syringe needle port assembly with knurled fittings

S7 & S8

S7 and S8 connectors are typically found on traditional pH sensors which no temperature compensation. They are the same basic design however S8 connectors have PG13.5 mounting threads, while S7 connectors do not. These connectors are recessed thus care must be taken to avoid moisture getting trapped which could lead to a short circuit.

Close-up of an M12 threaded metal connector fitting with coarse external threads

M12

Metallic threaded M12 connectors are found on Hamilton VisiFerm mA and VisiTrace mA Dissolved Oxygen Sensors, as well as Hamilton’s Wi 2G Bluetooth Wireless Adapter. M12 adapters have either 4 or 8 poles hidden within the socket. Since the poles are recessed, avoid getting moisture inside the connection.

Close-up of a stainless steel fluid connector fitting with "HAMILTON" label visible

T82

The T82 connector is sometimes known as a D4 connector. It uses a twist lock design to secure the cable to the sensor. These connectors are less common and only found on the Hamilton OxyFerm FDA Dissolved Oxygen Sensors.

Black and orange multi-pin electrical connector with locking ring

Memosens

These inductive electrical connectors are only found on digital pH sensors using Memosens technology. They use a twist lock design to affix the cable. There are no exposed metallic connections on Memosens connectors.