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The Keyence CU-21A is an inductive proximity sensor. It is supplied by SHLY-PLC, an independent industrial-automation distributor: every unit is visually inspected and functionally checked before dispatch, held in ready stock and shipped worldwide for maintenance, spares and retrofit use. Share your application or existing part number and our team will confirm fitment and comparable in-stock alternatives.
Technical parameters compiled from the manufacturer data sheet and reference documentation.
| Technical Specifications | |
| Type Designation | |
| Model | CU-21A |
| Type | Standard |
| Power Supply | |
| Rating Power voltage | 100 to 240 VAC ±10 %, 50/60 Hz |
| Power consumption | 7 VA max. |
| Inputs & Outputs | |
| External calibration input signal Connection sensor | NPN open-collector output type or type with output with contacts (signal input and synchronization input) |
| Input No. of inputs | 2 |
| Minimum input time | 5 ms |
| Input system | Transistor (via NPN output device), contact (via limit switch/microswitch, etc.) |
| Control output | Relay output: 1c, 250 VAC, 2 A (resistive load) |
| Transistor | ― |
| DC output | 12 VDC ±10%, 200 mA max. |
| Mechanical | |
| Weight | Approx. 105 g |
| Environmental | |
| Environmental resistance Ambient temperature | -10 to +50 °C 14 to 122 °F (No freezing) |
| Relative humidity | 35 to 85 % RH (No condensation) |
| Other | |
| Timer | ― |
| Functions | AND logic |
| Operation mode | Standard, synchronous |
Model variants, options and firmware revisions can affect fitment. Before ordering the Keyence CU-21A inductive proximity sensor, share your existing part number or project requirements and our team will cross-reference comparable in-stock Keyence units and verify compatibility. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for identification only.
A: Each CU-21A is inspected and functionally checked before sale. Contact us for the current stock condition and quantity.
A: In-stock orders placed before 14:00 ship the same business day. Standard worldwide delivery is about 5-8 business days, express shipping is available and orders over $500 ship free.
A: Yes. Share your existing part number or application and our technical team will verify compatibility and provide cross-references to comparable in-stock models.
CU-21A · Technical reference data · Independently supplied by SHLY-PLC
Place your order before 14:00 for earliest possible shipment handover. With round-the-clock transit operated by our partnered global logistics providers, parcels reach most international destinations following routine customs processing. Economy shipping takes 5–8 business days, while express delivery arrives in 5–8 business days, both subject to customs clearance progress.Shipping fees will be charged for all orders under USD 500, and the exact shipping cost will be determined and collected by our logistics carriers. Shipments to remote international regions will incur additional courier surcharges to offset extra cross-border transportation costs.
Factory warranty service is not applicable to this industrial control equipment, and extended warranty packages are not provided for this item.
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