NEW - SIS 190 double Customer Benefit - Measurements without Interruption The sound intensity probe SIS 190 double allows a simultaneous sound intensity measurement in a very large frequency range. For this purpose an arrangement of one one-dimensional 1/2" sound intensity probe and one onedimensional 1/4" sound intensity probe is formed. Due to its two-channel technology each individual Sound Intensity Probe makes it possible not only to measure sound pressure levels but also to record the sound pressure gradient which is needed to calculate the sound intensity. The SIS 190 double consists of the Measuring Microphone Capsules Pairs MK 290 E (2x MK 222 E) and MK 390 E (2x MK 301 E) with matched phase response and frequency response. Due to the use of the 1/4” Measuring Microphone Preamplifiers MV 310, sound field distortions (shadowing and diffractions) are minimal. The distance between the microphone pairs is defined by spacers (6 mm, 50 mm). These enable measurements in a frequency range between 35 Hz and 12 kHz. The quality of conformance between the microphone pairs with regard to their transforming functions is measured in compliance with DIN EN 61043 and documented as Minimum pressure-residual intensity index for probes. Each microphone capsule pair comes with a measuring protocol. It shows the tolerance limits for class 1 probes. SIS 190 double, IEPE*/ICP , Measuring microphone preamplifiers 1/4" MV 310, Measuring microphone capsule pair 1/2" MK 290 E, Measuring microphone capsule pair 1/4" MK 390 E, 2 Adapter A 69.1 1/2"-1/4", Spacer 1/2" 50 mm, Spacer 1/4" 6 mm, Output 10-pin LEMO, connects to a handle, Case in aluminium

Frequency curves Technical data pre-amplifier Current consumption Transducer excitation voltage Frequency range Range of tolerance RL=100k; Ce=3.3nF; Ce=22pF RL=100k; Ce=5,6pF Gain RL=100k; Ce=22pF RL=100k; Ce=22pF RL=100k; Ce=22pF RL=100k; Ce=5.6pF RL=100k; Ce=5.6pF RL=100k; Ce=5.6pF Input impedance Output impedance Inherent noise A-weighted; RL=100k; Ce=22pF linear 20Hz to 20 kHz; RL=100k; Ce=22pF A-weighted; RL=100k; Ce=5.6pF linear 20Hz to 20kHz; RL=100k; Ce=5.6pF Plug microphone capsule Polarization voltage Frequency range Open-circuit Sensitivity Max. SPL ≤ 3% THD at 1 kHz Inherent noise...