·Dual rotating coil structure;
　·Key contactor plated gold or silver；
　·High spurious frequency,Wide band；
　·Lower distortion smaller than 0.1%；
　·Main parameters are controlled within ±2.5%;
　·High signal to noise,small phase
      difference,high dynamic resolution

 

Specifications（at  20℃）

20DS10 20DS14 20DS28 20DS35 20DS40 Natural Frequency(Hz) 10±2.5% 14±2.5% 28±2.5% 35±2.5% 40±2.5% Open Circuit Damping 0.25,0～＋5% 0.20±2.5% 0.60±2.5% 0.60±2.5% 0.681±2.5% Damping with Shunt Resistance 0.60,0～±5%(1339Ω) 0.686,0～±5% (1000Ω) 0.60±2.5%  (640Ω) — — — intrinsic Voltage Sensitivity(V/cm·s-1) 0.288±2.5% 0.288±2.5% 0.31±2.5% 0.325±2.5% 0.34±2.5% Sensitivity with Shunt Resistance(V/cm·s-1) 0.225±2.5%(1339Ω) 0.209±2.5%(1000Ω)  0.182±2.5%  (640Ω) — — — Coil Resistance(Ω) 375±2.5% 375±2.5% 385±2.5% 560±2.5% 662±2.5% Distortion(%) ＜0.1 ＜0.1 ＜0.1 ＜0.1 ＜0.1 Typical Spurious Frequency(Hz)  ≥240  ≥320  ≥420  ≥520  ≥520 Suspending Mass(g) 11.0±2.5% 11.6±2.5% 11.2±2.5% 9.3±2.5% 9.3±2.5% Case to Coil Motion p-p (mm) 2.0 2.0 1.6 1.8 1.8 Maintains Specification to Tilt 10° 10° 90° 90° 90° Basic Unit Diameter(mm) 25.4 25.4 26.0 26.0 26.0 Basic Unit High(mm) 32.0 32.0 32.0 32.0 32.0 Operating Temperature(℃) -40—+90 -40—+90 -40—+90 -40—+90 -40—+90 Warranty (year) 3 3 3 3 3