Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Transmitting and Receiving Switch

BII-2100 Transmitting & Receiving Switch: 0 to 60dB Gain

Usable bandwidth: 1kHz to 1MHz
High Input dynamic range: 86 dB
Programmable gains
Simple interfaces to power amplifier/transducer/DAQ
Automatic switching of transmitting and receiving
Built-in high voltage protection
Built-in bandpass filters
Easy calculation of echo sounding distance
Suggested Application  
Ultrasonic Flaw/Flow Detection
Sea-floor Mapping System, Sub-bottom Profiling System
Sidescan Sonar, Multibeam Sonar, Echosounder
Underwater Communication, Transponder
Artificial Acoustic Target Echo sounding
Fishery and Plankton Sonar: Echo-counting, Echo-integration
Target Strength Measurement, Abundance Estimate
Compensation of Sound Propagation Losses
Seafloor Scattering, Roughness, Penetration, reflection and other properties
Object Detection, Distance Measurement, Sound Velocity Profiler ...

Related Products

BII-5000 Series Power Amplifier: SONAR Transducer BII-1030 0 to 80dB Variable Gain Preamplifier (for TVG)
BII-6000 Series Impedance Matching and Tuning Unit BII-1090 0 to 60dB Programmable Gain Preamplifier
Underwater Transducer SONAR, Echosounder, Communication, Fishery ... BII-2030 Envelope Detection of Sonar Signals


TR Switch BII-2101 BII-2102 BII-2103 BII-2104 BII-2106 BII-2109
Available Bandwidth:
150 to 400kHz 50 to 150kHz 20 to 50kHz 10 to 20kHz 1 to 10kHz 400kHz to 1MHz
Echo Sounding Distance: ≥0.1m ≥0.5 m ≥2 m ≥5 m ≥10 m ≥0.1m
Gain (dB): 0, 20, 40, 60 0, 20, 40, 60 0, 20, 40, 60 0, 20, 40, 60 0, 20, 40, 60 20, 40, 60
Power Supply  
Supply Voltage: +10.5 to +30VDC
Current (Quiescent): 6.5mA/10mA
Cable Length: 0.15m
Cable Shielded Cable
Red Wire: +VDC; Black Wire: Common
Connector: Wire Leads
Suggested DC Supply: +9VDC Battery, Marine Battery, Automobile Battery, Fixed DC Linear Power Supply, Not Included.
DO NOT use variable power supply whose maximum supply voltage is higher than the above rated voltage.
DO NOT use switching mode DC power supply.
Signal Type: Pulsed SINE, Chirp, PSK, FSK, etc.; Pulsed Square Waveform
Maximum Voltage: 600Vrms with Duty Cycle ≤ 1%.
Maximum Current: 10 Arms
Cable Length: 0.15m
Cable Type: Wires
Connector: Wire Leads
Gain: 0, 20, 40, 60dB for BII-2101, BII-2102, BII-2103, BII-2104, BII-2106
20, 40, 60 for BII-2109
Input Dynamic Range:
(10kHz Bandwidth)
86 dB
Band Pass Filter: 2nd order, 40dB/Decade Roll-off
Cable Drive Capability: 200m
Gain Selection:  
Selection Manually: Connecting the Red or white wire to the shield wire: A1 = 0 or Logic Low
Disconnecting the Red or white wire from the shield wire: A1 = 1 or Logic High
Connecting the black wire to the shield wire: A0 = 0 or Logic Low
Disconnecting the black wire from the shield wire: A0 = 1 or Logic High
Shield wire is Digital COMMON.
Switch, relay, optocoupler etc. can also be used for "connecting" and "disconnecting", and voltage protection rating of these "switch" devices must be greater than power supply voltage level.
Selection Digitally: a 2-bit digital output word to the gain selection inputs.
Shield wire shall be connected to Digital COMMON.
TTL/CMOS Compatible: Logic Low: 0 to 0.8V; Logic High: 2.4 to Vcc (Vcc: Power Supply Voltage).
Note: voltage protection rating of Digital Outputs must be greater than power supply voltage level.
Truth Table: BII-2109                             BII-2101, BII-2102, BII-2103, BII-2104, BII-2106
A1  A0  Gain(dB)                  A1  A0  Gain(dB)
0    0    0                             0    0    0
0    1    20                           0    1    20
1    0    40                           1    0    40
1    1    N/A                         1    1    60
Cable: 0.15m Shielded Cable
A1: Red or White Wire; A0: Black Wire; Shield wire: Digital COMMON.
Connector: Wire Leads
Echo Output:  
Echo Signal: Waveform, AC Coupled
Type: Single Ended
Drive Capability: BII-2101: 15m; BII-2102: 35m; BII-2103: 100m; BII-2104: 100m; BII-2106: 100m
BII-2109: 15m.
Output Impedance: 20Ω
Cable Length: 0.15m
Cable: Coax, 50Ω
Connector: 1. BNC Male (BNC)
2. Wire Leads (WL)
Size (mm): ΦDxH=60x15
Weight: 110 Grams
Operating Temperature: -40°C to 85°C
Storage Temperature: -50°C to 105°C
Wiring: Click BII-2100 Series wirings for details.
How to order:      
BII-210x -xxx -xxx -xx
TR Switch Highpass Frequency
in kHz
Lowpass Frequency
in kHz
Echo Connector
Example of Part Number: Description
BII-2103-30-40-BNC: BII-2103, 30kHz HP filter, 40kHz LP filter, BNC Connector for Echo Signal.
BII-2103-30-50-WL: BII-2103, 30kHz HP filter, 50kHz LP filter, Wire Leads for Echo Signal.

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