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REED RELAYS FOR DATA ACQUISITION
In Data Acquisition (DAQ) applications, measurements need to be taken from a wide range of transducers and sensors, usually to be converted to digital information which is then suitable to be used by computer software or PLCs. For example, where thermocouples are used for temperature measurement or monitoring. These signals can be very low and reed relays are often the best choice to switch between the sensors and the data acquisition instruments.
It is important to have low and stable contact resistances and very low thermal offset voltages helping to mitigate any unacceptable errors that can be introduced when switching very low signal levels. Along with very low leakage currents and capacitance when compared to semiconductors, and hermetically sealed contact surfaces protected from oxidization when compared to electromechanical relays, all of these can be key factors for accurate measurements.
The Pickering Series 100 and 101 have very low thermal EMF performance, use instrument grade reed switches very low leakage currents making them the ideal choice in these sometimes demanding DAQ applications.
Recommended Reed Relays for Data Acquisition
Ultra High Density Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Fast operate and release times (as low as 80μs or less) make these relays suitable for high-speed test systems. Body dimensions from (W x H x D): 3.9 x 9.5 x 3.9mm. Available forms: 1 Form A & 2 Form A contact configurations.
High Density Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Switches feature sputtered ruthenium contacts for long life and high reliability. Body dimensions from (W x H x D): 6.6 x 9.5 x 3.7mm. Available forms: 1 Form A, 1 Form A Coax, 2 Form A, 1 Form B, and 1 Form C contact configurations.
Miniature High-Voltage Reed Relays
These relays have switching voltages up to 1.5kV and standoff voltages up to 5kV. The maximum switch current is 1A (up to 25W) and the maximum carry current is 1.5A. High coil resistance options (up to 6.8kΩ). Thermal EMF devices are between 3 and 10μV. Relays can endure temperatures as high as 150°C if requested. Body dimensions from (W x H x D): 12.5 x 6.6 x 3.7mm. Available forms: 1 Form A, 2 Form A, and 1 Form B contact configurations.
High Voltage Reed Relays
These relays have switching voltages up to 12.5kV and minimum standoff voltages up to 20kV. The maximum switch current is 3A (up to 200W) and the maximum carry current is up to 5A. Option of PCB pins, chassis, PCB mounting, and flying leads. Body dimensions from (W x H x D): 58.4 x 19.0 x 12.6mm. Available forms: 1 Form A, 1 Form B, and 1 Form C contact configurations.
High Coil Resistance Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Featuring high coil resistances (up to 6kΩ), devices are ideal for portable instruments. Body dimensions from (W x H x D): 8.13 x 15.24 x 4.8mm. Available forms: 1 Form A, 2 Form A, 1 Form B, and 1 Form C contact configurations.
Low Thermal EMF Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Devices feature low thermal EMF (around 1μV or less) and low power consumption. Body dimensions from (W x H x D): 20.1 x 9.4 x 7.4mm. Available forms: 1 Form A, 2 Form A, 1 Form B, and 1 Form C contact configurations.
Industry Standard Size Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Featuring superb contact resistance stability and ultra-high insulation resistance. Body dimensions from (W x H x D): 19.1 x 7.6 x 4.8mm. Available forms: 1 Form A, 2 Form A, 1 Form B, 1 Form C, and 2 Form C contact configurations.
Low Capacitance Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Ultra-low capacitance levels of typically 0.1pf, compared to typically 2.5pF for a standard device. Body dimensions from (W x H x D): 19.1 x 8.1 x 4.8mm. Available forms: 1 Form A contact configuration.
Coaxial Reed Relays
These relays have a maximum switch current of 1A (up to 20W), and the maximum carry current is 1.2A. Devices with 50 and 75Ω coils are suitable for up to 5GHz, making them ideal for RF Signal Switching, RF switched tunable filters, and High-Speed Digital Switching. Available in thru-hole and SMT. Body dimensions from (W x H x D): 12.5 x 6.6 x 3.7mm. Available forms: 1 Form A and 1 Form B
Shop Reed Relays for Data Acquisition
The below table will help you narrow down our offering to get you the correct reed relay for your application.
Once you narrow your selections down you can download a reed relay data sheet for more information or request a quote to find out prices and lead times.
Part Number |  | Contact Configuration | Switching Current (Amps) | Switching Power (Watts) | Switching Voltage (DC or AC peak) | Stand-off Voltage (DC or AC peak) | Coil Voltage | Coil Resistance (Ω) | Switch Type | Diode | Depth (mm) | Width (mm) | Height (mm) | View Datasheet | Sample Service | Stock | Price | Add to Bag |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 1 Form A - SPST N.O. | 0.5 Amps | 10 | 200 | 240 | 24V | 6000 Ω | Low Level Dry Reed | No | 7.4 | 20.1 | 9.4 | 0 - MTO | $11.27 | ||||
 | 2 Form A - DPST N.O. | 0.5 Amps | 10 | 200 | 240 | 12V | 3000 Ω | Low Level Dry Reed | No | 7.4 | 20.1 | 12.5 | 16 | $13.38 | ||||
 | 1 Form C - SPDT Changeover | 0.25 Amps | 3 | 200 | 200 | 12V | 6000 Ω | Changeover | Yes | 7.4 | 20.1 | 9.4 | 5 | $16.26 | ||||
| 1 Form A - SPST N.O. | 1 Amps | 20 | 200 | 240 | 12V | 6000 Ω | General Dry Reed | No | 7.4 | 20.1 | 9.4 | 0 - MTO | $11.36 | ||||
| 2 Form A - DPST N.O. | 1 Amps | 15 | 200 | 240 | 5V | 1000 Ω | General Dry Reed | No | 7.4 | 20.1 | 9.4 | 0 - MTO | $12.77 | ||||
| 1 Form A - SPST N.O. | 0.5 Amps | 10 | 200 | 240 | 5V | 3000 Ω | Low Level Special | Yes | 7.4 | 20.1 | 9.4 | 0 - MTO | $10.96 | ||||
| 2 Form A - DPST N.O. | 0.5 Amps | 10 | 200 | 240 | 24V | 6000 Ω | Low Level Dry Reed | Yes | 7.4 | 20.1 | 12.5 | 0 - MTO | $14.80 |
