Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Transmitting and Receiving Switch

Transmitting and Receiving Switchtransmitting and receiving switch

Underwater TransducerTransmitting and Receiving Switch


BII-2100 series transmitting and receiving switches (TR Switch) are designed with controllable or fixed receiving gains for uses in echo sounding, communication, object detection, distance measurement, fishery sounder, etc...

There are two types of gain-selection signals in BII-2100 series: Digital Signals (TTL/CMOS level) and Analog Signals, which provide flexible solutions for your active SONAR system. The digital gain selection signals (TTL/CMOS level compatible) are for easy wiring to digital outputs of the DAQ of a computer or microcontroller, and the gain can also be set up manually with connecting/disconnecting gain selection wires. The analog gain control signals (analog DC or AC voltage) are for easy wiring to DAC outputs of a computer or microcontroller and adjust the gain continuously in dB.

There are two output types in BII-2100 Series: Echo waveform or Envelope of the echo waveform. Generally, envelope of the signal is of low frequency (≤20kHz), Low cost low speed A/D converter (or DAQ Module) can be used to sample the envelope.

TR2100 series TR switches have very low noise level and provide 90dB (or 86dB) input dynamic range, which is suitable to monitor the exciting signal and the highly attenuated echo signal. Working with 12 bit or 16 bit A/D converter and TVG (Time Variable Gain) law in software, BII-2100 series can compensate underwater propagation loss of much greater than 90dB.

TR Switch with Fixed Receiving Gain Click TR Switch with Fixed Receiving Gain for specs.
TR Switch with Digital Gain Selection Click TR Switch with Digital Gain Selection for specs.
TR Switch with Analog Gain Control Click TR Switch with Analog Gain Control for specs.

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