Air Micro Switch [DPA]
0.002mm gap can be
detected reliably!
Air Micro Switch with ±1 μm repeatability enables stable detection of gaps between jig and workpiece without contact.
The IP67 protective structure realizes the precise adhesion and seating confirmation under harsh working conditions.
Reasons to choose Air Micro Switch
±1μm Repeatability
The ±1μm repeatability, which is 10 times as high accuracy as conventional air sensors, can stably detect 2 to 80 μm gaps between the jig and workpiece.
The precise adhesion and seating confirmation realize a prevention of machining faults and improvement of machining accuracy.
350μm Detection distance type
The IP67 protective structure is resistant to harsh working conditions!
The IP67 protective structure also enables the installation under harsh working conditions such as the inside of the CNC machines where coolant splatters.
By shortening air piping, it is possible to improve response speed and realize higher accuracy.
Product list
| Product No. | Price | Download | |||||
|---|---|---|---|---|---|---|---|
 |
DPA-A2 |
Please request for a quote. | Catalog （PDF） |
Manual （PDF） |
CAD （DXF） |
||
Specification
| Repeatability | ±1μm * |
|---|---|
| Response speed | 0.8 second * |
| Protective structure | IP67 |
| Detection distance | Adjustable within the range of 2 to 80 μm
(10 μm at the factory setting) Set with the signal point adjustment tab |
| Setting pressure | 0.1MPa |
| Operating temperature range | 0°C – 60°C (no condensation) |
| Contact rating | DC5V-DC24V |
*Tube length : 1.5 m when using a recommended nozzle
Metrol VS Competitor
| Metrol’s Air Micro Switch |
Air sensors / Gap sensors made by another companies |
|
|---|---|---|
| Repeatability (detection distance) |
 ± 0.001mm （0.002〜0.08mm） |
 0.01mm〜 （0.01〜0.25mm） |
| Protective structure | IP67 (Applicable to the use under harsh working conditions where coolant splatters) |
IP66 (Unsuitable for the use under harsh working conditions where coolant splatters) |
| Response speed | About 0.8 seconds (Air piping length : 1.5 m) An installation of the sensor body inside the machine can shorten the air piping length. |
About 5 seconds (Air piping length : 12 m) An installation of the sensor body outside the machine can require the extension of air piping length. |
| Movement differential | 2μm |
約10〜30μm |
| Numeral display | No display (ON/OFF signals only)* |
Display |
*Because the high-accuracy “precision positioning switch” is adopted in the internal mechanism, the threshold can be easily set with the masterpiece and signal point adjustment tab.
High accuracy of Air Micro Switch
Metrol’s Air Micro Switch has " high-accuracy diaphragm" for pressure-sensitive element.
The “precision positioning switch” detects a “slight movement of diaphragm” by the difference between the internal pressure in A and that in B chamber and determines OK/NG, and the high accuracy can be demonstrated.
*The conventional air sensors use “pressure-sensitive element” and the amp amplifies and detects the signal, therefore, the signal set position are variable due to temperature drift.
Applications
Adhesion confirmation in machining the engine
The 10 times as high accuracy as the conventional air sensors can realize precisely cutting and machining the engine.
Adhesion confirmation to mold pressed by oil pressure
A 10μm of foreign materials is stably detected in gaps between the cope and drag.
Adhesion confirmation in machining tire molds
A 10μm uplift by the cutting chips can be detected by the improvement of the machining accuracy.
Adhesion confirmation in processing computer components
The installation of IP67 inside the machine can reduce considerably the takt time from 5 to 0.8 seconds.
Measuring the thickness of the wafer
The thickness of wafer can be measured by 2μm precision under harsh working conditions where cutting chips splatters.
Detection of the gap in the casting equipment
Small gaps of the mold can be steadily detected by 2μｍ precision under high-temperature environment.