QP2269
From Bobs Projects
QP2269 Non-Contact Voltage Tester/IR Thermometer is a combined NCV Tester and IR Thermometer sold in Australia by Jaycar Electronics. It runs on 3 x LR-44 Button Cells (included), so around 4.5VDC.
Dismantling
- open the battery compartment and removed the 3 button cells
- remove the "NCV" rubber button from the base of the unit by pulling it out
- the PCB will then slide out the IR end with a little prising of the "sides" of the tube near the IR end
- the LCD module can be unscrewed from the PCB will a fine Phillips head screw-driver
- the shroud around the Thermal IR detector can be removed
Internals
The Thermal IR detector is in a 4-pin TO-18 style case (around 5mm dia.) The part number "3214" and "OJ" appear to be stamped on the side. It has 4 leads, with pin 4 connected to the case, which is not electrically connected to GND.