Temperature controlled soldering iron
Temperature controlled soldering iron allows you to solder a wider range of electronics and circuit boards without overheating and damaging them.
They come with adjustable temperature settings. Electronic temperature control allows precise control of the heat level at the tip of the soldering iron. Most of the soldering irons produce tip's temperature in the range of 662-842 degrees Fahrenheit (350- 450 degrees Celsius).
Electronic temperature control means you'll always know if the tip of the soldering iron is hot enough for the material you are soldering. It makes your soldering work a whole lot easier.
If you do not pay attention to the temperature of the iron’s tip you can accidentally damage or ruin your soldering project by applying too much heat. For every soldering task, you need enough heat to quickly and reliably melt the solder and apply it to soldering joints, but you do not want too much heat that can burn or melt delicate electronic components or circuit boards/
There are three basic designs of soldering irons regarding temperature control.
The first type of soldering iron does not have any form of temperature regulation. This is a simple unregulated soldering pencil - just plug it in the power outlet and in a couple of minutes it is ready for soldering. This soldering pencil is usually sold as a separate soldering tool but it can be a part of a soldering kit. It is good only for do-it-yourself projects, soldering a wire and some standard soldering projects in households. This type of soldering irons is the simplest and the cheapest type of soldering irons.
The second type of soldering irons is a temperature controlled soldering iron. These soldering irons have built-in temperature control to ensure that the temperature of the iron bit is maintained at a fixed level. A thermocouple is built into the iron tip or shaft, which monitors temperature. Some soldering irons have a bimetallic strip thermostat built into the handle.
These soldering irons come with a low-voltage power station (typically around 24 Volts DC) and a rotary control knob on the station as a controller for setting the desired temperature on the iron's tip. It is easy to adjust the desired temperature - turning the knob clockwise increases iron's temperature while turning a knob counterclockwise decreases temperature. Some models of temperature controlled soldering iron come with "+" and "-" buttons instead of the control knob, so increasing heater temperature is done by pushing the "+" button while decreasing temperature is done by pushing the "-" button. The temperature of the iron can be precisely adjusted within 10°F with the front panel temperature control knob. The wattage of these irons is usually in the range of 50 -70 watt. These soldering irons are more expensive than unregulated soldering pencils. From this group, we recommend the following irons: Weller WE1010 (digital soldering iron), Weller WES51 (analog soldering iron) and Hakko FX-888.
The third type of temperature controlled soldering irons is complete soldering systems for repair and rework. This soldering system usually consists of a complete benchtop control unit where you can plug in a variety of soldering tools including soldering iron, hot air soldering gun, de-soldering gun, thermo–tweezers for removing surface-mount resistors and capacitors, stand for iron, etc. This is the most expensive type of soldering iron. These soldering stations are designed for or for professional use, continuous production line, rework and repair stations in high volume manufacturing. From this group, we recommend Pace multichannel rework station MBT350.
Digital Soldering Iron
Some models of temperature controlled soldering iron might have built-in digital temperature readout. The current temperature of soldering iron is displayed on digital readout all time during soldering. As soon as you push one of the buttons to adjust the temperature of the heating element, the digital readout shows a set temperature. When you are done with setting the digital readout switches back and shows the current temperature of the iron's tip.