-Constant Temperature and Humidity Clean Room

Products-Quality management, incoming quality control—MIL-STD-105 Production line operator quality control, 100% inspection, Professional quality control personnel sampling, and out-going quality control—MIL-STD-105

Lon-So keeps strengthening production equipments, adopting most advanced machines, not only ensures product quality but also take care of tatal outputs, and which guarantee our punctual shipments, without ant delay in delivery. All production process from R&D of products through shipments is strictly controlled by experienced professional, in addition to the independent quality control room for best stable and quality products.

International Quality International Quality


Clean product inspection packaging room—PU dust free

Clean product inspection packaging room—central temperature & humidity Control

Clean product inspection packaging room

Clean product inspection packaging room

Clean product inspection packaging room-temperature & humidity display

Clean product inspection packaging room-quality inspection packaging

We have various precise inspection instruments such as 2.5D coordinate measuring instrument, inner (and outer) diameter centimeter, outer diameter centimeter, electronic measuring platform standard block gauge, torque wrench, granite surface plate, cylinder gauge, plug gauge, hardness tester, and electronic vernier caliper among others that enanle us to meet the goal of monitoring quality and maintaining stability in operation.




Inspection room


Quality Inspection Equipment

  • Thermometer (+- 1 degree)
  • Hardness tester(A)
  • Vernier caliper (+-1um)
  • Level
  • Quality inspection record
  • Granite surface plate
  • Inner(and outer) diameter centimeter

Quality inspection equipment

  • Electronic Vernier caliper (+-1um(o.o1mm)
  • Mold thermometer +- 1 degree
  • Thickness gauge +-1um(0.01mm)
  • Cylinder gauge
  • Altimeter
  • Precision block gauge/plug gauge
  • Tensile test machine

Color Matching Equipment

  • gloss tester
  • color difference meter
  • Light source Box
  • standard color card
  • electronic weigher (+-0.2g)

Having been in the field for over 41 years, we meet requirements of customers offering quality products. OEM/ODM orders are more than welcome.

Please contact us directly for quality service as we are always pleased to do our best to help you