SPEEDAIRE
SPEEDAIRE 41H528 Reed Switch Dovetail vacuum pump
A reed switch with dovetail mounting, normally-open operation, 30 mA maximum switching current and 120 V AC maximum voltage, nine-foot leads and an LED indicator
- Reed switch detects cylinder position without contact
- 30 mA max switching current protects low-power circuits
- Operates from 0 to 120 V AC for wide compatibility
- LED display gives instant visual status confirmation
- 9 ft lead length simplifies wiring in large setups
Product identity
The SPEEDAIRE 41H528 is a reed switch with a dovetail mounting style designed for pneumatic position sensing. It operates as a normally open contact that closes when a magnetic piston passes the sensor. The two-wire lead extends nine feet for flexible routing to a controller or relay. An integrated LED provides visual confirmation of the switch state during operation.
Who it suits and who it does not
This switch suits maintenance teams and OEMs automating cylinders with bore diameters between three-quarters and four inches. It handles switching currents up to 30 mA across 0 to 120 volts AC within a temperature span of minus four to 176 degrees Fahrenheit. Installations needing normally closed logic, DC-only circuits, higher current loads or bore sizes outside the stated range should select a different sensor.
Deciding specification
The normally open function combined with a 30 mA maximum switching current at 120 volts AC is the critical parameter that determines compatibility with the control circuit. Verify that the load current stays below this limit and that the controller expects a normally open contact before specifying this reed switch for the application.
Highlights
- Reed switch detects cylinder position without contact
- 30 mA max switching current protects low-power circuits
- Operates from 0 to 120 V AC for wide compatibility
- LED display gives instant visual status confirmation
- 9 ft lead length simplifies wiring in large setups
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
What bore diameter range does the dovetail reed switch fit?
The reed switch is designed for bore diameters from 3/4 inch to 4 inches, allowing direct dovetail mounting on cylinders within that range.
How do you wire the two-lead normally-open reed switch during installation?
Connect the two wires in series with the load; the switch closes when a magnetic field is present, so verify polarity if the LED indicator is used.
When should the reed switch be replaced based on its electrical ratings?
Replace the switch if the load exceeds 30 mA switching current or 120 V AC switching voltage, or if the LED no longer illuminates during actuation.
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