FG-100B Digital Thermometer

As low as £210.00
In stock
  • Automatic measurement to standardize the process
  • Automatic temperature measurement
  • Measurement counter can be useful for control of changing sensor.
  • Fine sensor can deliver accurate measurements.


Automatic measurement to standardize the process
Minimize individual differences in how to complete measurement and read result.

Automatic temperature measurement:AUTO HOLD Function

The measurement will end automatically when tip temperature is stabilized.
The measurement process will be the same no matter who does it.

Constant display of measured max. temperature:MAX HOLD Function

Max measured tip temperature will be displayed.
This function can be useful for quality control of components and P.W.B.

Temperature Sending Function
Measurement result by AUTO HOLD function or MAX HOLD function can be sent to a soldering station (coming soon) through infrared.
This function can eliminate manual process of recording results, the time for the process, and human error.

* Image photo below
AUTO HOLD function and MAX HOLD function cannot be used at the same time.


Temperature Measurement Count Function

Number of tip temperature measurement will be automatically counted.
This function can be useful for control of changing sensor.

Auto Shutoff Function

The power will automatically be shut off after 3 minutes of no use.
It can save battery power and time for changing battery.

Fine sensor can deliver accurate measurements.

  • Suitable for Lead-Free Solder
  • Disposable sensor always maintains accurate temperature measurment
    (Replace sensor when the measuring point underwent degradation)

Dimensional Measurement

Allows you to measure from any desired direction according to tip shape

Dimensional Measurement
* Design image only

Several ways of measurement can be possible with temperature probes. (Option)

For soldering pot

For hot air station


Initial display (room temperature) appearing when the power is turned ON

It is not necessary to deduct the room temperature that was displayed when the power was turned ON from the measured temprature. The temperature appearing on the LED display is the actual measured value.

Guaranteed temperature range with the measurement tolerance of ±3°C

In general, the optimal temperature range for soldering is 300°C to 500°C, and that for SMD rework system is 300°C to 600°C. The tolerance of ±3°C within the optimal temperature range (300°C to 600°C) is assured. For the temperature range other than the above, the tolerance is not guaranteed but usually stays in the range of about ±5°C.

Packing list

Model No. Packing List  
FG-100B HAKKO FG-100B セット内容 Unit, 006P 9 V dry battery (for trial), Sensor (qty 10 ), Instruction manual

HAKKO FG-100B should be calibrated regularly as a Tester / Meter.
For details, please contact the distributors in your country.


Model No. FG-100B
Power supply 006P 9V dry battery (alkaline cell recommended)
Temperature resolution 1ºC
Temperature measurement range 0 to 700ºC
Temperature precision ±3ºC (300 to 600ºC)
±5ºC (other than above)
Temperature sensor K (CA)type thermocouple
Display LCD : 3 1/2 digits
Operating environment Ambient temperature/humidity range : 0 to 40ºC, 20 to 90%RH (without condensation)
Environmental conditions Applicable rated pollution degree 2 (According to IEC/UL 61010-1)
Dimensions 68(W)×140(H)×38(D) mm
Weight 125g

* Dimensions : excluding protrusions
* Weight (excluding battery)


Replacement Parts

  Part No. Name Specifications
photo:191-212 191-212 Sensor (qty 10) lead-free Buy
Change-out rate of sensor
The sensor replacement period is about 50 times per single sensor in general, but this changes depending on the temperature used and the components in the solder and flux.
If you use lead-free solder, the sensor needs to be replaced more frequently. 
If the sensor degrades because it is being eaten away by the solder, it will register a low temperature. Even if the sensor is not broken, replace it after about 50 measurements. 

Even if the soldering tip has degraded, the temperature will register extremely low. Keep these points in mind and decide on the sensor replacement period.
Caution: The sensor is extremely thin and may break if pushed with force.


  Part No. Name Specifications  
photo:A1310 A1310 Temperature probe for soldering bath & pot Buy
photo:C1541 C1541 Temperature probe hot air Buy
photo:A1556 A1556 Sensor A   Buy
photo:A1557 A1557 Sensor B   Buy
Several ways of measurement can be possible with temperature probes.
For soldering pot No.A1310
For hot air station No.C1541
For soldering pot
For hot air station
temperature probes A1310
How to use the temperature probe for hot air station.