| PartNumber | MK23-90-B-2 | MK23-90-C-2 | MK23-90-B-1 |
| Description | Proximity Sensors SPST-NC 1 Form C Surf Mnt S Gull wing | Proximity Sensors SPST-NC 1 Form C Surf Mnt S Gull wing | Proximity Sensors 1 Form CSPST-NC Slot Mount, AT 1015 |
| Manufacturer | Standex Electronics | Standex Electronics | Standex Electronics |
| Product Category | Proximity Sensors | Proximity Sensors | Proximity Sensors |
| RoHS | Y | Y | Y |
| Sensing Method | Magnetic | Magnetic | Magnetic |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Maximum Operating Temperature | + 130 C | + 130 C | + 130 C |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Packaging | Reel | Reel | Reel |
| Description/Function | 1 Form C (SPST NC) | 1 Form C (SPST NC) | - |
| Height | 1.78 mm | 1.78 mm | - |
| Length | 14 mm | 14 mm | - |
| Series | MK23 | MK23 | MK23 |
| Width | 1.78 mm | 1.78 mm | - |
| Brand | MEDER electronic (Standex) | MEDER electronic (Standex) | MEDER electronic (Standex) |
| Operating Supply Current | 500 mA | 500 mA | 500 mA |
| Operating Supply Voltage | 175 V | 175 V | 200 V |
| Factory Pack Quantity | 2500 | 2500 | 2500 |
| Part # Aliases | 9231291015 | 9231291520 | 9233291015 |