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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.

Body Style	Rectangular
Brand/Series	D-M9 Series
Connector Type	Grommet
For Use With	CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2
Leads	5.0 m
Mounting Type	Direct
Output Type	PNP
Primary Type	Proximity
Type	Hall Effect
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• SMC Corporation
  Sensor, solid state, direct mount, grommet connection, for MX/MH/CQ2/NCQ2/NCQ8
  
  型号：D-M9PSAPC
  仓库库存编号：70070921
  
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• SMC Corporation
  Sensor, solid state, direct mount, grommet connection, for MX/MH/CQ2/NCQ2/NCQ8
  
  型号：D-M9PSAPC
  仓库库存编号：70070921
  
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• 搜索

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• SMC Corporation
  Sensor, solid state, direct mount, grommet connection, for MX/MH/CQ2/NCQ2/NCQ8
  
  型号：D-M9PSAPC
  仓库库存编号：70070921
  
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• Pepperl+Fuchs Factory Automation
  Cordset
  
  型号：V3S-GM
  仓库库存编号：70093955
  
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• Alpha Wire
  Wire, Hook-up; TC; 10 AWG; 105/30; Black mPPE ins; 0.144" OD; 600V; UL VW-1
  
  型号：6719 BK005
  仓库库存编号：70134549
  
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• Alpha Wire
  Wire, Hook-up; TC; 10 AWG; 105/30; Grn/Ylw mPPE ins; 0.144" OD; 600V; UL VW-1
  
  型号：6719 GY005
  仓库库存编号：70134553
  
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• Alpha Wire
  Wire, Hook-up; TC; 10 AWG; 105/30; White mPPE ins; 0.144" OD; 600V; UL VW-1
  
  型号：6719 WH005
  仓库库存编号：70134558
  
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• Alpha Wire
  Green/Yellow, EcoWire Plus Single Core Hook Up Wire, 3.08 mmsq CSA, 300V 12 AWG, 30m
  
  型号：6830 GY005
  仓库库存编号：70134752
  
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• Alpha Wire
  Hook-Up Wire 12 AWG; 7/32; 0.032 in.; 0.094 in.; -20 degC; 105 degC; 600 V
  
  型号：3080 WH005
  仓库库存编号：70136076
  
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Body Style Rectangular  SMC Corporation Body Style Rectangular  Hall Effect Sensors Body Style Rectangular  SMC Corporation Hall Effect Sensors Body Style Rectangular   Brand/Series D-M9 Series  SMC Corporation Brand/Series D-M9 Series  Hall Effect Sensors Brand/Series D-M9 Series  SMC Corporation Hall Effect Sensors Brand/Series D-M9 Series   Connector Type Grommet  SMC Corporation Connector Type Grommet  Hall Effect Sensors Connector Type Grommet  SMC Corporation Hall Effect Sensors Connector Type Grommet   For Use With CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2  SMC Corporation For Use With CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2  Hall Effect Sensors For Use With CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2  SMC Corporation Hall Effect Sensors For Use With CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2   Leads 5.0 m  SMC Corporation Leads 5.0 m  Hall Effect Sensors Leads 5.0 m  SMC Corporation Hall Effect Sensors Leads 5.0 m   Mounting Type Direct  SMC Corporation Mounting Type Direct  Hall Effect Sensors Mounting Type Direct  SMC Corporation Hall Effect Sensors Mounting Type Direct   Output Type PNP  SMC Corporation Output Type PNP  Hall Effect Sensors Output Type PNP  SMC Corporation Hall Effect Sensors Output Type PNP   Primary Type Proximity  SMC Corporation Primary Type Proximity  Hall Effect Sensors Primary Type Proximity  SMC Corporation Hall Effect Sensors Primary Type Proximity   Type Hall Effect  SMC Corporation Type Hall Effect  Hall Effect Sensors Type Hall Effect  SMC Corporation Hall Effect Sensors Type Hall Effect