Shenzhen Hongyan Technology Co.,Ltd, founded in 2003, is a company specializing in all kinds of digital instruments -- Laser tachometer, grain moisture meter, stroboscope, lux meter, wood moisture meter, sound level meter, temperature meter, anemometer, infrared temperature meter, coating thickness tester, distance measuring meter, surface resistance tester, wire tracker, phase-sequence meter and so on.Tachometer:Non-contact tachometer -- photoelectric tachometer, laser tachometer, light flash frequency meter.Contact tachometer -- wire speed meter.2 in 1 tachometer -- photoelectric / contact tachometer, laser / contact tachometer, photoelectric / laser tachometer, laser / wire speed tachometer.3 in 1 tachometer -- photoelectric / laser contact tachometerTemperature meter: I.R temperature meter, Dual channel thermometer, Single channel thermometer, Indoor temperature meter, Temperature and humidity meter.With a complete scientific quality management system, good quality and good faith, we win good reputation and occupied this field. Welcome friends from all over the world come to visit, guide and negotiate.