5840 Thermometer Selector Switch.

Thermometer Selector Switches may be operated either manually or remotely via the Thermometer Bridge or computer. 

The Type 5840CS/6 accepts up to 6 thermometers and the Type 5840C5/15 will accept up to 15 thermometers.

A standby current of 1 milliamp is available on all positions. This enables thermometers when not selected to be energized continuously to avoid a warming up period when selected. 
Units can be supplied with terminals or BNC sockets and should be specified when ordering. 

Model 5648 Temperature Controlled Enclosure

This enclosure has been specially designed to accommodate a single precision resistor of the following types: 5685A, 5685B, 5685 or 5615 enabling improved stability when used in a non temperature controlled environment. These enclosures are factory set at 36°C, However, they can be supplied to operate at other temperatures.