Overview
These are inexpensive, very small
magnetic reed sensors that can be
used to sense the position of an airbrake or flap actuator or to sense
that the landing gear is up or down and locked. They can be
ordered in versions that are normally-open (no current flow when not activated, current flow
when activated) or normally-closed (current flow when not activated, no
current flow when activated).
Related Pages
Terminology
- NO (Normally Open) -
current flow when activated, no current
flow when not activated
- NC (Normally Closed) -
no current flow when activated, current
flow when not activated
Applications
- Airbrakes Locked
The goal is to have current flow when the airbrakes are not closed and
locked (fully forward)
- Use a normally closed sensor
at the forward (airbrakes locked) position
- Landing Gear Down and Locked
The goal is to have current flow when the landing gear is not down and
locked.
- If the sensor is mounted in the gear
down and locked position then use a normally closed sensor
(recommended).
- If the sensor is mounted in the gear
up position then use a normally open sensor.
- Flap Handle (Cruise/Climb)
The goal is to have current flow when the flap handle is in the
climb range (flaps at +1 or greater) and no current flow when the flap
handle is in the cruise region (flaps at -2, -1, 0). The magnet
(or multiple magnets) is mounted on the flap actuator handle and the
sensor is mounted on the cockpit sidewall.
Note: You may need to use several magnets (actuators) to make sure the
switch is activated during the full travel of the flap handle in the
desired range.
- If the sensor is mounted in the
cruise region of the flap handle's travel (flaps at -2, -1, 0) then
use a normally closed sensor. (recommended)
- If the sensor is mounted in the
climb region of the flap handle's travel (flaps at +1 or greater)
then use a normally open sensor.
Switch Comparison
Magnetic reed sensors have some advantages and some disadvantages when
compared with the mechanical lever switches. Note that
both sensor types have moving parts - reed switches have small internal
mechanical switches which have a finite life - just like mechanical lever
switches do.
- Magnetic Reed Switch
- Advantage: Non-contact, no friction
- Disadvantage: A magnetic target
(actuator) must be mounted on the item being sensed.
- Mechanical Roller Switch
- Advantage: The switch senses the
actual item being sensed so no magnet needs to be mounted on the
item being sensed.
- Disadvantage: Mechanical contact is
required so there will be some friction in applications where the
target is moving relative to the sensor.
|
Part # |
Description |
Photo
Click on image to view larger version |
Price |
Lead-time |
 |
|
59140-010 |
Sensor, Magnetic Reed,
Normally Open - With Magnet
You will need at least one 57140-000 Magnetic
Actuator to use with this sensor.
This is an inexpensive, small magnetic reed switch that can be used
to sense the position of an airbrake or flap actuator or to sense that
the landing gear is up or down and locked. This model is
configured for "normally open" operation which means that there is
current flow when the target magnet is within range and no current flow
when it is out of range.
Applications
- Landing Gear in the up position
- Flap handle in the climb region
Features
-2 part magnetically operated proximity sensor
-Compact size requires only 3.2cm2 (1.26") board space
-Case design allows screw down or adhesive mounting
-Left or right hand side cable exit
-300mm (12") Flying leads
-UL approval
Benefits
-No standby power requirement
-Operates through non-ferrous materials such as wood, plastic or
aluminum
-Hermetically sealed, magnetically operated contacts continue to operate
long after optical and other technologies fail due to contamination
-Simple installation and adjustment
Terminology
- NO (Normally Open) -
current flow when activated, no current
flow when not activated
- NC (Normally Closed) -
no current flow when activated, current
flow when not activated
Applications
- Airbrakes Locked
The goal is to have current flow when the airbrakes are not closed and
locked (fully forward)
- Use a normally closed sensor
at the forward (airbrakes locked) position
- Landing Gear Down and Locked
The goal is to have current flow when the landing gear is not down and
locked.
- If the sensor is mounted in the gear
down and locked position then use a normally closed sensor
(recommended).
- If the sensor is mounted in the gear
up position then use a normally open sensor.
- Flap Handle (Cruise/Climb)
The goal is to have current flow when the flap handle is in the
climb range (flaps at +1 or greater) and no current flow when the flap
handle is in the cruise region (flaps at -2, -1, 0). The magnet
(or multiple magnets) is mounted on the flap actuator handle and the
sensor is mounted on the cockpit sidewall.
Note: You may need to use several magnets (actuators) to make sure the
switch is activated during the full travel of the flap handle in the
desired range.
- If the sensor is mounted in the
cruise region of the flap handle's travel (flaps at -2, -1, 0) then
use a normally closed sensor. (recommended)
- If the sensor is mounted in the
climb region of the flap handle's travel (flaps at +1 or greater)
then use a normally open sensor.
Switch Comparison
Magnetic reed sensors have some advantages and some disadvantages when
compared with the mechanical lever switches. Note that
both sensor types have moving parts - reed switches have small internal
mechanical switches which have a finite life - just like mechanical lever
switches do.
- Magnetic Reed Switch
- Advantage: Non-contact, no friction
- Disadvantage: A magnetic target
(actuator) must be mounted on the item being sensed.
- Mechanical Roller Switch
- Advantage: The switch senses the
actual item being sensed so no magnet needs to be mounted on the
item being sensed.
- Disadvantage: Mechanical contact is
required so there will be some friction in applications where the
target is moving relative to the sensor.
Dimensions and
Technical Specifications |
 |
$9 |
In
Stock |
 |
|
59140-040 |
Sensor, Magnetic Reed,
Normally Closed - With Magnet
You will need at least one 57140-000 Magnetic
Actuator to use with this sensor.
This is an inexpensive, small magnetic reed switch that can be used
to sense the position of an airbrake or flap actuator or to sense that
the landing gear is up or down and locked. This model is
configured for "normally closed" operation which means that there is
current flow when the target magnet is out of range and no current flow
when it is in range.Applications
- Airbrake handle in the forward (airbrakes locked) position
- Landing Gear in the down and locked position
- Flap handle in the cruise region
Features
-2 part magnetically operated proximity sensor
-Compact size requires only 3.2cm2 (1.26") board space
-Case design allows screw down or adhesive mounting
-Left or right hand side cable exit
-300mm (12") Flying leads
-UL approval
Benefits
-No standby power requirement
-Operates through non-ferrous materials such as wood, plastic or
aluminum
-Hermetically sealed, magnetically operated contacts continue to operate
long after optical and other technologies fail due to contamination
-Simple installation and adjustment
Terminology
- NO (Normally Open) -
current flow when activated, no current
flow when not activated
- NC (Normally Closed) -
no current flow when activated, current
flow when not activated
Applications
- Airbrakes Locked
The goal is to have current flow when the airbrakes are not closed and
locked (fully forward)
- Use a normally closed sensor
at the forward (airbrakes locked) position
- Landing Gear Down and Locked
The goal is to have current flow when the landing gear is not down and
locked.
- If the sensor is mounted in the gear
down and locked position then use a normally closed sensor
(recommended).
- If the sensor is mounted in the gear
up position then use a normally open sensor.
- Flap Handle (Cruise/Climb)
The goal is to have current flow when the flap handle is in the
climb range (flaps at +1 or greater) and no current flow when the flap
handle is in the cruise region (flaps at -2, -1, 0). The magnet
(or multiple magnets) is mounted on the flap actuator handle and the
sensor is mounted on the cockpit sidewall.
Note: You may need to use several magnets (actuators) to make sure the
switch is activated during the full travel of the flap handle in the
desired range.
- If the sensor is mounted in the
cruise region of the flap handle's travel (flaps at -2, -1, 0) then
use a normally closed sensor. (recommended)
- If the sensor is mounted in the
climb region of the flap handle's travel (flaps at +1 or greater)
then use a normally open sensor.
Switch Comparison
Magnetic reed sensors have some advantages and some disadvantages when
compared with the mechanical lever switches. Note that
both sensor types have moving parts - reed switches have small internal
mechanical switches which have a finite life - just like mechanical lever
switches do.
- Magnetic Reed Switch
- Advantage: Non-contact, no friction
- Disadvantage: A magnetic target
(actuator) must be mounted on the item being sensed.
- Mechanical Roller Switch
- Advantage: The switch senses the
actual item being sensed so no magnet needs to be mounted on the
item being sensed.
- Disadvantage: Mechanical contact is
required so there will be some friction in applications where the
target is moving relative to the sensor.
Dimensions and
Technical Specifications |
|
$9 |
In
Stock |
|
|
57140-000 |
Magnetic Actuator for
use with 59140 Sensors
This is the magnetic target that is sensed by the 59140 sensor.
At least one is needed with every sensor, but you may need
additional magnets for applications which require activation over a
distance - such as sensing when the sensor is within a range of flap
handle positions.
Dimensions and Technical Specifications |
 |
$9 |
In
Stock |
|
|
