Non-destructive testing of wood panels by either resonance or time-of-flight (TOF) methods provides possibilities for predicting their static bending properties. In the present study, three non-destructive devices (BING - Beam Identification by Non-destructive Grading by CIRAD, Montpellier, France, Fakopp Ultrasonic Timer and Sylvatest TRIO) were used for measuring the dynamic stiffness of different particleboard types. Fakopp Ultrasonic Timer and Sylvatest TRIO produce ultrasonic pulses to measure the sound velocity while BING uses resonance frequencies. Commercially produced particleboards with different thickness and densities were used to measure the dynamic modulus of elasticity (MOE_dyn) in two directions (parallel and perpendicular to the production line) and at three different humidity levels (dry - 35%, standard - 65% and wet - 85% RH in constant temperature of 20°C ). MOE_dyn of particleboards were correlated with the static moduli of elasticity (MOE_stat) and rupture (MOR_stat). It was found that the non-destructive methods gave higher MOE_dyn values in both production directions than that of MOE_stat values. MOE_dyn was found to decrease from dry to wet conditions. A very strong and statistically significant correlation existed between MOE_dyn and static bending properties. MOE_dyn correlated stronger to MOE_stat than MOR_stat. At different humidity level, all three methods- Fakopp Ultrasonic Timer, BING and Sylvatest TRIO analyses showed good predicting capabilities to estimate MOE_stat and MOR_stat of different particleboard types with high level of accuracy.