HT332A Metal Detector with Relay Output / Electronics Kit

Item ID : 184217101
HT332A Metal Detector with Relay Output / Electronics Kit
Sale Price : RM 34.98
Price includes GST (6%)
Shipping (*Exclude GST) :
Peninsular :RM7Sabah, Labuan:RM10Sarawak:RM9
Option :
Ship To : Within Malaysia, ship by Courier Services, Self Collect
Item at : Johor Bahru / Johor
Views : 4351
Payment Method : Cheque, Internet Banking, Credit Card, Bank Transfer

HT332A Metal Detector with Relay Output / Electronics Kit


HT-332A is a Metal Detector with relay output. It will turn on the buzzer and relay output when metal object is present within the sensing range.   

 Product Features

  • Input Voltage: 9-12VDC
  • Max Detecting Distance: 2cm (Subject to 8cm Diameter of Metal Object was Detected)
  • Used coil method
  • Sensitivity is adjustable
  • LED Indicator for Relay On
  • With Buzzer & Relay Output
  • Easy-To-Make


Assembly Instructions

  • Check off the components in the package against the component listing before assembly.
  • Start with the smallest components working up to the taller components, soldering any interconnection wires last.
  • Place and Solder the components into the board, make sure the components are in right position according to the overlay of PCB.


Test & Adjustment

  • After assembled, please check & ensure the value & polarity for all components were inserted into PCB correctly, wrong polarity connection of capacitors can caused explosion of failure.
  • Next, ensure all these leads are soldered, no solder bridges between adjacent pads and no dry joint.
  • Once confirmed, connect the power source to the circuit board.
  • For maximum sensing range, turn preset (P1) fully clockwise while Preset (P2) fully anti-clockwise. Next, turn preset (P1) anti-clockwise slowly until the LED light up and then turn preset (P2) clockwise slowly until the LED goes out.
  • When metal object was detected, the relay coil will be energized to enable the output. Also, the buzzer and Red LED indicator on the PCB will turn on.
  • When no metal object is detected or out of sensing range, the relay coil will be de-energized to disable the output. Also, the buzzer and the Red LED indicator will turn off.



  • Package includes schematic, printed circuit board and components
  • You need to have a soldering skill and basic knowledge of testing
  • For any inquiry or other technical problem, please contact us through or 07-3344473


Last Updated @ 8/27/2016 12:40:51 PM

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Q&A (5)
michelle412 ask: (2016/3/17 19:03)  
The buzzer and led light up every time the battery is connected. I have tried to adjust both the variable resistor and another adjustable one can u tell me what can I do to make it work?
hitectrons reply: (2016/3/18 09:59)  
Hi, we suspected the value & polarity for some components were inserted into PCB wrongly, please re-check and make sure the components are placed in the right position. Next, ensure all these leads are soldered, no solder bridges between adjacent pads and no dry joint.
sirobin19 ask: (2014/8/24 10:30)  
Kalau hantar ke dungun berapa lama boleh sampai?
hitectrons reply: (2014/8/25 09:02)  
We will post the item to you by Pos Laju, usually it takes 1-2 working days for delivery to Terengganu.
kciv80 ask: (2014/7/23 09:35)  
1.dia punya coil ikut sekali ka....
2.ada gambar yg dah siap pasang......
hitectrons reply: (2014/7/23 11:26)  
Q1:Yes, coil is included.
Q2:is it same as above photo, only the shape of coil is slightly different.
eJaXx92 ask: (2013/1/30 23:49)  
do you provide the circuit schematics?
hitectrons reply: (2013/1/31 10:26)  
schematic diagram is included inside the kit set. Thank you.
mastersurf ask: (2012/11/3 15:10)  
How do use this thing? you place it at the bottom of a stick? What is the motor for?
hitectrons reply: (2012/11/3 15:29)  
usually people buy this kit set to detect coin such as vending machine or piggy bank.

No motor in this kit set.


HT332A Metal Detector with Relay Output / Electronics Kit
RM 34.98 Shipping fee (*Exclude GST):Peninsular: RM 7, Sabah/Labuan: RM 10, Sarawak: RM 9,
International: RM
Combine Shipping allowed

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