When you need a magnetic safety sensor for machine safety, the choice usually comes down to how much of the interlock you want in one box and how much technical detail you need before you commit. Two Schmersal BNS 33 series sensors sit across a $153-to-$215 price range: the BNS33-11ZG-2128 with a magnet actuator and the BNS 33-12ZG for machine safety control. Both are magnetic safety sensors, but they are not identical purchases, and the price spread is only the beginning of the difference.
Quick verdict
The BNS33-11ZG-2128 is the more complete package: it spells out 10 amp / 24 VDC operation and gives you IP67 sealing plus an M8 4-pin connector. The BNS 33-12ZG sits at the lower end of the $153-to-$215 price spread and is the more direct single-sensor option for machine safety control. If you need a ready-to-install interlock set with documented ratings, the BNS33-11ZG-2128 is the stronger choice. If budget is the priority and you only need a BNS 33 series sensor on its own, start with the BNS 33-12ZG.
At a glance
| | BNS33-11ZG-2128 with Magnet Actuator | BNS 33-12ZG |
| Price | USD 215.00 | USD 153.00 |
| Condition | New - Open box | New |
| Country of Origin | Germany | China |
| What the title tells you | Safety magnetic sensor with magnet actuator | 1PC BNS 33-12ZG magnetic safety sensor |
Where each product wins
- BNS33-11ZG-2128 wins when you want the complete safety interlock package and you value a specification-rich purchase.
- BNS 33-12ZG wins when you want a single BNS 33 series sensor and a straightforward replacement is your goal.
Product notes
SCHMERSAL SAFETY MAGNETIC SENSOR BNS33-11ZG-2128 with Magnet Actuator 101148482
Choose this one when you want a complete safety interlock package from the title itself: the BNS33-11ZG-2128 with the matching magnet actuator handles the two parts of a coded-magnet interlock in one purchase. The product description specifies a sealed IP67 thermoplastic enclosure, 10-amp / 24 VDC operation, an M8 4-pin connector, and cable termination, which makes it straightforward to match against an existing machine guard circuit. Its condition is New - Open box, so the trade-off is that you are receiving a previously opened unit rather than a sealed factory-fresh box. If your purchasing process can accommodate that condition, the detailed specifications and the inclusion of the actuator make this the more fully documented option of the two.
1PC BNS 33-12ZG Schmersal Magnetic Safety Sensor ID179748 Machine Safety Control
The BNS 33-12ZG gives you a single BNS 33 series safety sensor with the model number and the machine safety control description in the title, so the purchase scope is easy to understand. It is a straightforward replacement option when you already know the sensor you need for your machine safety setup. On the trade-off side, this sensor is made in China, while the BNS33-11ZG-2128 comes out of Germany, so if source country matters to your facility, that is the difference to weigh. The title identifies it as 1PC, meaning you are buying one sensor rather than a set.
Final choice by use case
Go with the BNS33-11ZG-2128 if you want the full safety interlock kit. Go with the BNS 33-12ZG if a new, single sensor is all you need. Both sit in the same BNS 33 family; the right one depends on whether you want everything in one box or just the sensor itself.
