Sensor Classification

Sensor classification schemes range from very simple to the complex. Depending on the classification purpose, different classification criteria may be selected. Here, we offer several practical ways to look at the sensors.

All sensors may be of two kinds: passive and active. A passive sensor does not need any additional energy source and directly generates an electric signal in response to an external stimulus; that is, the input stimulus energy is converted by the sensor into the output signal.

The examples are a thermocouple, a photodiode, and a piezoelectric sensor. Most of passive sensors are direct sensors as we defined them earlier. The active sensors require external power for their operation, which is called an excitation signal. read more

KEYENCE Laser Sensor LR

As we know,many types of sensor used for input device for equipment,machinery,robotic and others application to made works more easy,low human failed and automatic function.

This time i want share about Laser Sensor LR-Z series from KEYENCE,Japan.This laser sensor is the one of my favorite for machine application because it is user friendly,simple setup,high durability,heavy duty,long life span,unique design and also up to date technology. read more

Relay Characteristics

Relay manufactures design them for special applications to full fill industries needed and coupe with advanced technologies. This time i want share information about relays characteristics most often used in typical automation and instrumentation work.

As i explained in my last posted,basically principal for small DC and AC relays,sensitive relays, miniature and sealed relays, and some small power relays is common.

To get a suitable relay for our application,we should understand about basic relay characteristic and general specification about operation and relay design because manufacture designs many types of relay for different application.

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Types of Relay

In automation industries,relay is a common device used for control application.Basic operation of  electrical relay is a device that changes the state of a circuit in response to it being energized or de-energized by that or another circuit.

It function to open or close the circuit or contact and respond depend on signal that we gave it to the magnetic coil.It have normally open and normally close contact that we can choose when design the control circuit for our application.

For generally understanding,relay also may consider as a amplifier and controller.It only a small device in automation circuit but it have important roles to make our system running accordingly. read more

How to choose speed controllers for AC motor?

Now around the world are using the speed controllers to control and drive their electric motor such as frequency inverter and soft starter.This speed control get a good reputation to reduce electricity cost and high efficiency to drive electric motor.

Speed controller is low maintenance and have a long life span.It easy to install and user friendly to setup and setting the parameter.

The wiring for power supply and control circuit is not so complicated like conventional motor control.This post i want share some basic aspects for choose the suitable ac motor speed controller that we must consider when to buy or install it on our application.I hope this information can be the basic guideline. read more


This device is very common used in manufacturing industry,office,house hold,school,highway and every placed around us.It very important to sensing and send a signal to control panel for further application.

Basically we can elaborate meaning of sensor in easy understanding are device to detected physical condition such as temperature,pressure,motion,metal and non-metal and many more function.

Sensor application very popular  for industries such as automotive,FPD and semiconductor,machine or metal,ICs and electronic components,food processing and packaging also rubber and plastic.It successful to make production running properly,accurate,smooth and faster. read more

Safety interlocking devices

For the electrical power distribution,we used a switch gears to control our distribution power supply to user.One of important things when design the system,we must include with safety interlocking device.

Motor control design also need to attach with interlocking system to ensure the operation is safe for user and can prevent for serious damage of equipment.

Before we design the control circuit or operation sequence,the important aspect that we should consider is about interlocking and must have a deep study to make sure it function properly.

Types of interlocking method

Normally in industry,interlocking devices have a two (2) types of method such as electrical and mechanical control.Their main purposes for interlocking system are  : read more