SPEEDAIRE
SPEEDAIRE 41H531 Reed Switch Dovetail 0.5 ft 30mA 120V AC -4 to 176F LED 2-wire
A reed switch with dovetail mounting, .5 ft leads, 30mA at 120V AC, LED indicator, and -4 to 176°F operating range
- Reed switch detects cylinder position with dovetail mount
- 30 mA max switching current protects low-power circuits
- Operates from -4 °F to 176 °F for harsh environments
- Built-in LED gives instant visual status indication
- Two-wire 0.5 ft lead simplifies installation
SPEEDAIRE 41H531 Reed Switch
This SPEEDAIRE 41H531 reed switch is a magnetic position sensor designed for pneumatic cylinders with bore diameters from 3/4 to 4 inches. It suits automation technicians and maintenance engineers who need reliable end-of-stroke detection on air-powered equipment. The normally open contact closes when a magnetic piston passes the dovetail mounting slot. It operates on 0 to 120V AC circuits with a maximum switching current of 30mA.
Dovetail mounting and two-wire AC connection
The dovetail profile slides directly into standard cylinder switch grooves, eliminating brackets and saving installation time. A 0.5 ft lead length keeps wiring tidy inside cable carriers or conduit runs. Because the switch draws power from the load circuit, it requires no separate supply voltage, freeing up terminal block space and reducing panel complexity. The built-in LED confirms actuation at a glance without extra indicator hardware.
30mA switching capacity and wide temperature range
The contact handles up to 30mA at 120V AC, which covers most PLC input cards and small relay coils used in compressor control panels. It remains functional from -4 to 176 degrees F, so it survives cold starts in unheated shops and heat soak near compressor heads. The low current rating means it cannot drive contactors, solenoids or motor starters directly; those loads need an interposing relay. Buyers who need higher switching current or DC voltage compatibility should select a different sensor.
Highlights
- Reed switch detects cylinder position with dovetail mount
- 30 mA max switching current protects low-power circuits
- Operates from -4 °F to 176 °F for harsh environments
- Built-in LED gives instant visual status indication
- Two-wire 0.5 ft lead simplifies installation
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
How long does the 0.5 ft lead last before signal loss?
The reed switch ships with a fixed 0.5 ft lead; signal integrity is maintained across that length at the rated 30 mA and 120 V AC.
Does the LED indicator add heat during continuous operation?
The built-in LED draws only the 30 mA switching current, so it adds negligible heat even at the upper 176 °F ambient limit.
What cylinder bore range must the mounting hardware already match?
The dovetail mount fits cylinders with bore diameters from 3/4 in to 4 in, so existing brackets must fall within that range.
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