The infraBSU uses a MEMS analog differential transducer whose sensitivity within the passband is measured using hydrostatic pressure:
MEMS water level | Sensitivity |
0.5 inches | 46 microV/Pa |
1.0 inches | 23 microV/Pa |
5.0 inches | 9.1 microV/Pa |
This instrument also includes a color-coded capillary attachment that determines the low-frequency corner of the passband:
Color | Capillary diameter | Corner frequency |
Pink | 25 microns | 0.016 Hz |
White | 50 microns | 0.031 Hz |
Yellow | 50 microns | 0.035 Hz |
Blue | 62.5 microns | 0.048 Hz |
Manufacturer | Model | Frequency / Period | Sensitivity | RESP Filename | Source | Comments |
Johnson | infraBSU | 0.016 Hz / 64.5 s | 0.000046 V/Pa | RESP.XX.IS011..BDF.INFRABSU.0_016.0_000046 | Johnson | |
Johnson | infraBSU | 0.016 Hz / 64.5 s | 0.000023 V/Pa | RESP.XX.IS012..BDF.INFRABSU.0_016.0_000023 | Johnson | |
Johnson | infraBSU | 0.016 Hz / 64.5 s | 0.0000091 V/Pa | RESP.XX.IS013..BDF.INFRABSU.0_016.0_0000091 | Johnson | |
Johnson | infraBSU | 0.031 Hz / 32.5 s | 0.000046 V/Pa | RESP.XX.IS014..BDF.INFRABSU.0_031.0_000046 | Johnson | |
Johnson | infraBSU | 0.031 Hz / 32.5 s | 0.000023 V/Pa | RESP.XX.IS015..BDF.INFRABSU.0_031.0_000023 | Johnson | |
Johnson | infraBSU | 0.031 Hz / 32.5 s | 0.0000091 V/Pa | RESP.XX.IS016..BDF.INFRABSU.0_031.0_0000091 | Johnson | |
Johnson | infraBSU | 0.035 Hz / 29 s | 0.000046 V/Pa | RESP.XX.IS017..BDF.INFRABSU.0_035.0_000046 | Johnson | |
Johnson | infraBSU | 0.035 Hz / 29 s | 0.000023 V/Pa | RESP.XX.IS018..BDF.INFRABSU.0_035.0_000023 | Johnson | |
Johnson | infraBSU | 0.035 Hz / 29 s | 0.0000091 V/Pa | RESP.XX.IS019..BDF.INFRABSU.0_035.0_0000091 | Johnson | |
Johnson | infraBSU | 0.048 Hz / 21 s | 0.000046 V/Pa | RESP.XX.IS020..BDF.INFRABSU.0_048.0_000046 | Johnson | |
Johnson | infraBSU | 0.048 Hz / 21 s | 0.000023 V/Pa | RESP.XX.IS021..BDF.INFRABSU.0_048.0_000023 | Johnson | |
Johnson | infraBSU | 0.048 Hz / 21 s | 0.0000091 V/Pa | RESP.XX.IS022..BDF.INFRABSU.0_048.0_0000091 | Johnson |
Mary Templeton 10/21/2019