2 Wire and Namur sensors
Many of us have difficulties distinguishing between two-wire sensors and Namur sensors. We have provided links to both sensor types and tried to explain the differences, connections, and internal structures as best we could. However, for those who are in a hurry or just visiting our site for shopping, here is a brief summary:
Two-Wire Sensors: Regardless of the supply voltage, a two-wire sensor consists of one live wire for the power source and a wire for the polarized (usually a relay, contactor, or PLC optocoupler) source. Depending on the type of application, the load to be triggered can be connected to both the + and - poles. At this point, the internal resistance of the receiver is of great importance. More details can be found in the link above.
Namur Sensors: They are physically similar to two-wire sensors, but the most basic difference is that the working voltage is max 8.2V, mostly with 5mA current. They cannot work independently. Devices containing signal amplifiers and comparator circuits are always required for sensors. Namur sensors are used entirely for safety purposes in machines that produce "explosive" or critical "chemicals" or process hazardous materials. They are safer with their low signal and current not to cause an "electric arc." We have tried to provide details in the links above.
Our two-wire sensors consist of three separate headings:
- Models operating between AC 220V-24V
- Models operating between AC 220V-90V
- Models operating between DC 12V-30V
However, since both types of detection instruments work with 2 cables, there is confusion. We had to remove the Namur sensor models on our website due to this confusion. 80% of our sales were replaced by orders for classic two-wire sensors and we had to change all of them because of our customers' confusion. If you really need Namur in your application, we have them in stock. Please contact us by phone or email.
Dear visitors, like all the products on our website, our inductive sensors are devices produced for professional purposes aimed at the industrial automation sector. They have galvanic isolation and high switching speed, making them able to work in the same environment as possible electrical parazite generating devices such as frequency inverters, power sources, and induction motors. (Do not confuse them with economic series sensors)
+ Standart 3 wire DC inductive Sensors
+ All industrial sensor models
+ PLC for sensor -