All Products

SMC Corporation D-M9PL

SMC Corporation - D-M9PL - SENSOR,  PNEUMATIC,  NCQ2 CYLINDER,  4.5-28VDC POWER,  80MA PNP OUT View larger image View larger image
Image may be a representation.
See specs for product details.

Mfr. Part#:

Allied Stock#: 70070650

 RoHS Compliant Part

View More from SMC Corporation >>
Pricing (USD) & Availability
Standard Pricing
$36.11 (Each)

36 can ship immediately.

100 on order.

Request Lead Time

Minimum Quantity: 1 |  Multiples Of: 1


Body Style: Rectangular
Connector Type: Grommet
For Use With: CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2
Leads: 3.0 m
Mounting Type: Direct
Output: PNP
Output Type: PNP
Primary Type: Hall Effect Sensor
Supply Voltage: 4.5-28 VDC
Voltage, Supply: 4.5-28 VDC


One type of proximity switch is an enclosed reed switch that is activated by a permanent magnet mounted to the piston. As the piston approaches, the magnetic field closes the switch, completing an electric circuit and producing an electric signal. Others prefer to use Hall-effect (Solid-State) sensors in combination with a piston-mounted magnet. The main difference between these two devices is that a reed switch is a mechanical device, while a Hall-effect (Solid-State) switch is electronic, with no moving parts to wear out. Reed switches have the advantage of operating on AC or DC current; Hall-effect (Solid-State) switches are limited to DC only. Also, reed switches are about half the price of their electronic counterpart, although the price differential is decreasing. On the other hand, Hall-effect (Solid-State) devices react much faster than reed switches, on the order of 100,000 versus 500 Hz. It is a waste of money to install microprocessor-based logic, and then be hampered by a slow switch. Overall, the trend seems to be towards these solid-state devices. Both switches have a repeatability of 0.005" or less. But often rod velocity, not switch accuracy, determines the overall repeatability of rod position. Because air is a compressible fluid, precise positioning of the cylinder rod -- especially in midstroke -- is difficult, regardless of the switch used. In many applications, even if the switch is very fast and accurate, getting the valves to react fast enough may be the real problem. In such cases, mounting fast-acting valves as close to the cylinder as possible is important. This eliminates excess compressible air in the lines between cylinder and flow control, giving more precise control. Note: Switch mounting hardware sold separately.