SR21-RG Datalogic Photoelectric Sensor
Datalogic SR21-RG Photoelectric Sensor — Dealer, Supplier & Stockist in India
Buy the SR21-RG photoelectric sensor from Industrypapa — M8 housing and PNP / NPN selectable output. Stocked in India with a GST invoice, same-day dispatch on in-stock orders and worldwide delivery.
Product Overview
The Datalogic SR21-RG is a photoelectric sensor with M8 housing and PNP / NPN selectable output.
A photoelectric sensor detects the presence, absence or edge of an object by the light it interrupts or reflects, so nothing has to touch the target. The three sensing modes behave very differently in practice: through-beam gives the longest range and the most reliable detection but needs power and wiring on both sides; retro-reflective puts emitter and receiver in one housing and bounces the beam off a prism reflector; diffuse needs no reflector at all but its range depends on how reflective the target is. Polarised retro-reflective models add a filter that stops shiny targets from being mistaken for the reflector.
Manufacturer description: Photoelectric Sensor Photoelectric Fork Red/Green LED emission Label sensor red/green PNP/NPN - M8 2 mm high-resolution fork sensors for labeling and packaging.
SR21-RG Specifications
| Brand | Datalogic |
|---|---|
| Part Number | SR21-RG |
| Product Type | Photoelectric Sensor |
| Housing | M8 threaded barrel |
| Light Source | Red / green LED |
| Output | PNP / NPN selectable |
Specifications are taken from the manufacturer's published data for SR21-RG. Download the catalogue PDF above for the complete datasheet, wiring diagram and dimensions.
Typical Applications
- Conveyor part detection and counting
- Packaging and filling machines
- Bottling, FMCG and pharma lines
- Robot cell and pick-and-place position checks
- Machine guarding and jam detection
- OEM machine building
Why Buy SR21-RG from Industrypapa?
SR21-RG — Frequently Asked Questions
Q1. What is the price of SR21-RG in India?
Current pricing for the SR21-RG is shown on this page and includes a GST invoice. For OEM, project or repeat-order quantities, send us the quantity and we will quote bulk pricing.
Q2. What are the main specifications of the SR21-RG?
The SR21-RG is a photoelectric sensor with M8 housing and PNP / NPN selectable output. Full electrical data, wiring and dimensions are in the catalogue PDF linked above.
Q3. Which sensing mode should I choose?
Through-beam for the longest, most reliable range; retro-reflective when you can only wire one side and can mount a reflector; diffuse when there is no room for a reflector opposite. Shiny or transparent targets usually need a polarised retro-reflective model.
Q4. What does NO + NC mean on this sensor?
The sensor provides both a normally-open and a normally-closed output, so you can wire it either way round without changing the part. Light/dark operation is selected on the sensor.
Q5. Do you provide a GST invoice?
Yes. Every order from Industrypapa is supplied with a proper GST invoice valid for input tax credit.
Q6. Do you ship SR21-RG outside India?
Yes. We ship to 220+ countries via DHL, ARAMEX and FedEx with full export documentation.
Q7. How quickly can the SR21-RG be delivered?
In-stock orders placed before 2 PM are dispatched the same day from our Noida warehouse, reaching most Indian cities in 1–4 working days.
Q8. Can I get help choosing the right part?
Yes. Tell us the application — what you are detecting, the machine and the mounting — and our engineers will confirm whether the SR21-RG is the right choice or suggest an alternative.
Order Datalogic SR21-RG Today
Genuine stock, GST invoice and same-day dispatch — with engineering support if you need to confirm the selection first.
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