Among sensors, encoders, and machine safety products, choosing between a safety magnetic sensor and an industrial pressure sensor can feel like comparing a door lock to a thermometer: both are sensors, but they guard entirely different things. If your machine has a movable guard or an articulated robot arm that must stop when opened or moved, the Schmersal BNS33-11ZG-2128 with magnet actuator is the part designed for that job. If your machine simply needs to report pressure changes in an industrial line, the Honeywell 89028 4 pressure sensor is a lower-priced option worth considering. The price spread between them is wide - $215.00 for the Schmersal, $23.95 for the Honeywell - and it reflects their very different roles rather than one being 'better' than the other.
Quick Verdict
If you need a safety interlock for a movable machine guard or robot arm, the Schmersal BNS33-11ZG-2128 is the right choice: it is a coded-magnet sensor with a matched actuator, IP67 sealing, and a DC rating that fits safety circuits. If you need a straightforward pressure sensor and want to keep the cost low, the Honeywell 89028 4 is a practical pick on the lower end of the price range. Choose by the task, not by the price tag.
Comparison at a Glance
| Product | Price | Price Bar | Condition | Best For |
|---|---|---|---|---|
| Schmersal BNS33-11ZG-2128 | $215.00 | New - Open box | Safety interlock on movable guards | |
| Honeywell 89028 4 | $23.95 | New | Industrial pressure monitoring |
Where Each Product Wins
- The Schmersal BNS33-11ZG-2128 wins for machine safety interlocks. It is a coded-magnet sensor with a matched magnet actuator, and it is rated for 10 A at 24 VDC. Its reed switches close only in the presence of the matched magnetic array, making it a purpose-built guard interlock.
- The Honeywell 89028 4 wins for straightforward industrial pressure sensing. It is a new Honeywell pressure sensor with model 103716 and MPN 8902842131, dressed for industrial applications. It is the lower-priced entry in this matchup, which makes it a sensible fit when adding pressure monitoring without a large outlay.
Product Notes
Schmersal BNS33-11ZG-2128 Safety Magnetic Sensor with Magnet Actuator
If you are protecting a movable machine guard or an articulated robot arm, this Schmersal model is built for exactly that scenario. It is a coded-magnet sensor with a matched magnet actuator; the reed switches close only in the presence of the matching magnetic field, which is what makes it a safety interlock rather than an ordinary proximity switch. The IP67 rating and 10 A / 24 VDC rating give it a rugged profile for DC safety circuits. Choose it when your priority is stopping or preventing machine motion in a guard-open situation. Keep in mind that it carries the higher price in this comparison, and it is listed as New - Open box, so the packaging may show handling even though the sensor is new. It also includes the magnet actuator, and the chassis-compatible mounting style suits panel and frame applications.
Honeywell 89028 4 Industrial Pressure Sensor
The Honeywell 89028 4 is positioned for industrial pressure monitoring, not for safety interlocks. It is a new-condition sensor from Honeywell with model 103716 and MPN 8902842131, and its listed application is industrial use. It occupies the bottom of this price spread, which makes it an appealing pick when you want a pressure sensor without a large outlay. Its limitation is scope: it is not a coded-magnet safety interlock, so it cannot replace the Schmersal in a movable-guard safety circuit. It is also a pressure sensor, so you would use it to sense pressure changes rather than to detect an open guard. If your project calls for pressure monitoring and you want to keep the cost down, this Honeywell model is the straightforward choice.
Final Choice by Use Case
- For movable guard interlocks and robot arm safety: Schmersal BNS33-11ZG-2128. It is the one with a coded-magnet actuator design and a DC safety rating, and it carries the higher price to match.
- For industrial pressure sensing with a smaller outlay: Honeywell 89028 4. It gives you a new Honeywell pressure sensor with an industrial application tag, and it keeps the initial cost down.
- If you are unsure: Let the mounting location and the circuit decide. A safety magnetic sensor with a magnet actuator is a niche part; a pressure sensor is a different tool entirely.
