When you are comparing sensors, encoders, and machine safety components, it can feel confusing because they all live in the same broad area of machine hardware. The 300ppr Rotary Encoder Digital Meter Counter with Wheel & Mounting Bracket and the BNS 33-12ZG Magnetic Safety Sensor are not competing versions of the same part: one is a measuring/counting package, and the other is a magnetic safety sensor for machine safety control. The right pick depends on the job your line needs done.
Quick verdict
If your priority is roll-length measurement, wheel-based counting, or rotation counting, the 300ppr encoder package is the match. It is the lower-priced of the two at USD 86.20. If your priority is a safety sensor for a machine safety control circuit, the BNS 33-12ZG is the product to evaluate; its listed price is USD 153.00. Match the component to the role rather than picking by price alone.
Comparison at a glance
| Product | Listed price | Price bar | Primary role |
|---|---|---|---|
| 300ppr Rotary Encoder Digital Meter Counter with Wheel & Mounting Bracket | USD 86.20 | Roll-length measuring and counting | |
| BNS 33-12ZG Magnetic Safety Sensor (Machine Safety Control) | USD 153.00 | Safety sensor for machine safety control |
Where each product wins
Where the 300ppr encoder package wins: It is the more complete tool for measuring tasks. The package includes a digital electronic meter counter, a 300ppr rotary encoder, a wheel, and a mounting bracket. The encoder outputs 300 pulses per turn of the wheel, and the controller includes relay output for stop/start control, with a working voltage of 110-220V using a US plug.
Where the BNS safety sensor wins: It is the one positioned for machine safety control. The BNS 33-12ZG is a magnetic safety sensor for machine safety control, with identifier ID179748, so if your control circuit needs that type of sensor, this is the part to focus on. It is not competing with the encoder counter on measuring features.
Product notes
300ppr Rotary Encoder Digital Meter Counter with Wheel & Mounting Bracket
If your work involves roll length, wheel-based measuring, or counting rotations, this package brings the main pieces together: a digital electronic meter counter, a 300ppr rotary encoder, a wheel, and a mounting bracket. The encoder outputs 300 pulses per wheel revolution, and the controller includes relay output, so it can be set to send a stop/start signal when a preset value is reached. The working voltage is specified as 110-220V with a US plug, which is a practical fit for many US-style installations. Choose it for a measurement-focused task where the wheel-and-encoder package matches your line. Keep in mind that this is a measuring/counting package, not a dedicated magnetic safety sensor; if your application calls for a safety sensor rather than a counter, the encoder won't replace one.
BNS 33-12ZG Magnetic Safety Sensor (Machine Safety Control)
The BNS 33-12ZG is aimed at machine safety control rather than length measurement. It is built for that safety-control role, with identifier ID179748. If your machine's safety circuit calls for a sensor in this part style, this is the part to evaluate. The sensor's focus is the safety-control role, so for a roll-length measuring setup, the encoder package is the one that brings the wheel and counter to the job. Choose the BNS sensor when your task is machine safety control; leave the measuring work to the 300ppr encoder package.
Final choice by use case
- For roll-length measurement or rotation counting: Choose the 300ppr Rotary Encoder Digital Meter Counter with Wheel & Mounting Bracket. It is the measuring/counting package in this comparison.
- For machine safety control with a magnetic safety sensor: Choose the BNS 33-12ZG Magnetic Safety Sensor. It is the safety-control component in this comparison.
