Choosing between a photoelectric laser sensor and a pressure switch for your industrial setup is less about picking a winner and more about matching the sensing method to the job. If you need to detect an object's presence across a long gap, count parts moving down a line, or trigger a gate, the Photoelectric Switch 12mm 636V 020M Laser Sensor NPN uses a 20-meter optical beam to do that. If your concern is pressure in a hydraulic or pneumatic system, the Honeywell MER02000BYPNKABN01 Pressure Switch is the specialist you need. This head-to-head lays out the differences so you can choose with confidence.
Quick Verdict
The Photoelectric Switch is the pick when you need long-range object detection, counting, or positioning and your control circuit uses NPN inputs. The Honeywell Pressure Switch is the right choice when you're monitoring pressure in an automation, hydraulic, or pneumatic application. Neither one is universally "better"-they're built for different sensing tasks.
Comparison
| Feature | Photoelectric Switch 12mm 636V 020M | Honeywell MER02000BYPNKABN01 |
|---|---|---|
| Price | $39.72 | $49.99 |
| Sensing job | Photoelectric laser beam up to 20 m | Pressure switch for hydraulic/pneumatic |
| Electrical style | NPN, normally open, 6-36V | Industrial automation switch |
| Enclosure/condition | IP66 rated, new | New open-box surplus, box included |
Where Each Product Wins
Choose the Photoelectric Switch if you need…
- Long-range detection: the 0-20M beam can span wide doorways or conveyor sections.
- Weather-resistant sensing: it has IP66 construction for outdoor gates and garage doors.
- NPN compatibility: the normally-open NPN output is common in many industrial controllers.
Choose the Honeywell Pressure Switch if you need…
- Pressure monitoring: it's designed for hydraulic, pneumatic, and industrial automation systems.
- A clear part identity: with the Honeywell brand, model, and MPN listed, you know exactly which component you're getting.
- Surplus pricing with a box: it's new open-box surplus stock that includes the original box.
Product Notes
Photoelectric Switch 12mm 636V 020M Laser Sensor NPN
The Photoelectric Switch is a through-beam optical sensor for detecting objects, counting parts, or triggering gates. Its long range, up to 20 meters, makes it a fit for large doorways or conveyor runs. It runs on 6-36V DC and offers an NPN normally-open output, so confirm your controller's input wiring matches. It also has IP66-rated weatherproof construction for indoor/outdoor use, which helps if the sensor sits on an exterior gate. At $39.72, it's the less expensive option in this head-to-head. The main limitation is its specific electrical interface: NPN with a normally-open contact and an RCA connector won't work with every PLC input card.
Honeywell MER02000BYPNKABN01 Pressure Switch
The Honeywell Pressure Switch takes a completely different approach. Instead of a light beam, this switch responds to pressure changes in hydraulic, pneumatic, or industrial automation systems. It's new open-box surplus stock, and the box is included. The model number, MPN, and Honeywell branding give you a traceable part identity. If you're building a pressure monitoring circuit, this is the sensor you want. The limitation is its condition: as open-box surplus, it may have minor cosmetic marks or shelf wear from storage. Also, it won't help you detect object presence; it's specialized for pressure sensing.
Final Choice by Use Case
For a long-range object detection or gate automation project, start with the Photoelectric Switch 12mm 636V 020M Laser Sensor NPN. For a hydraulic or pneumatic pressure monitoring task, the Honeywell MER02000BYPNKABN01 Pressure Switch is the one to order. Match the sensing principle to your application, and you'll get the right sensor for the job.
