Dry Reed Switch Series

A dry-reed switch assembly contains ferromagnetic contact blades, hermetically sealed in a glass envelope which is filled with an inert gas. The switch is operated by an externally generated magnetic field, either from a coil or permanent magnet.

Features
• Long life
• Contacts isolated from the environment
• Superior glass-to-metal seal
• Ambient operating temperature -55 to +125°C
• Low operating power
• Plated or sputtered ruthenium on diffused gold for very low and stable contact
resistance
• Better than 1012 W open resistance
• Low cost compared with other magnetic devices
• UL recognition for most types

Applications
Dry-reed switches may be used in a wide range of applications, including:

• Reed relays, for use in:
- Audio and video equipment
- Automatic test equipment (ATE)
- Broadcast equipment
- Copy machines
- Motor transport
- Data processing equipment
- Domestic appliances
- Facsimile equipment
- Measuring and test equipment
- Military applications
- Modems
- Aircraft
- Security systems
- Smoke detectors
- Telephony

• Keyboards, for use in:
- Computers
- Military equipment
- Terminals
- Telephones
- Vending machines

• Key switches, for use in:
- Audio and video equipment
- Domestic appliances
- Pocket flashlights

• Automotive applications, for use with:
- Cruise control
- Level detectors
- Light control
- Safety belt sensors
- Tachometers and speedometers
- Air bag crash sensors

• Proximity switches, for use in:
- Conveyors
- Elevators
- Escalators
- Pneumatic cylinders
- Robotics

• Security system applications, used in:
- Door sensors
- Window sensors
- Position sensors

• Games and toys, for use in:
- Chess boards
- Dolls
- Trains

• Miscellaneous applications, including:
- Automatic change machines
- Flow sensors
- Float sensors
- Power meters
- Thermostats
- Domestic machines
- Rice cookers

Customized Dry-Reed Switches
In addition to the standard products described in this catalog, the following features can be supplied:

• Operate ranges to customer specification
• Preformed leads

Reed Switch Specifications
RI-70
Glass length 7mm; Max power 10W; Ideal ATE switch
RI-60
Glass length 10mm; Max power 10W; Ideal ATE switch
RI-27
Glass length 13.5mm; Max power 10W; Ideal ATE switch
RI-29
Glass length 13.5mm; Max power 20W
RI-23
Glass length 15mm; Max power 10W; General purpose switch
RI-21
Glass length 15mm; Max power 10W; High breakdown voltage
RI-25
Glass length 15mm; Max power 25W
RI-26
Glass length 15mm; Max power 20W; Close differential
RI-46
Glass length 20.5mm; Max power 40W
RI-48
Glass length 20.5mm; Max power 70W; Lamp load

Coto Technology, 55 DuPont Drive, Providence, RI 02907-3105. Tel: 401-943-2686; Fax: 401-942-0920.