Brüel & Kjær 8103 - Miniature Hydrophone Type 8103 for measuring waterborne sound/ acoustic probe/ Sound Pressure Gauge

Brüel & Kjær Miniature Hydrophone Type 8103 for measuring waterborne sound/ acoustic probe/ Sound Pressure Gauge 1. Model 8103 miniature hydrophone 2. JJ2615 Microdot Adapter for Microphone Preamplifier TESTED and is in excellent working condition. 19 ft. length of cable, comes with all original documentation and replacement “ O-ring” for the microphone cable(see picture). Original owner/purchased in 1984. This was originally purchased and owned by my father who was in the Blasting and Vibration business, the mic was used with a seismograph for waterborne data and sound. Brüel & Kjær hydrophones are transducers for measuring waterborne sound. Specifications and information from B&K: • MiniatureHydrophoneType8103 A small transducer with a high sensitivity relative to its size and good all-round characteristics; applicable to laboratory, industrial and educational use. Its high- frequency response is valuable when measuring pressure-distribution patterns in ultrasonic-cleaning baths, for example. Uses Cavitation measurements Ultrasonic measurements in liquids Acoustic investigation of marine animals Laboratory and industrial measurements in liquids and gases Noise measurements in humid and polluted atmospheres Features Frequency range: 0.1 Hz to 180 kHz Receiving sensitivity: –211 dB re 1 V/μPa Very small size (50 × 9.5 mm) –3dBlimitinairat15kHz Integral cable ending with 10-32 UNF connector (male), length from 1 to 400 m (3.3 to 1312 ft) The Miniature Hydrophone Type 8103 is fitted with a 6m integral double-shielded cable terminated with a B&K miniature plug JP0056 Signal Conditioning –170 –190 –200 –210 140 20 200 2k Frequency 5k 10k 20k Hz 5 10 20 3 50 100 200 50 950980/2 kHz 060179/2 In some cases, it is necessary to route the high-impedance output signals through a signal conditioning amplifier. Although the international standards call for calibration of the hydrophones’ voltage sensitivity (using a voltage amplifier), it is often more practical to use a charge amplifier, which will result in a charge sensitivity independent of the actual cable length. Types 8103 While the entire Brüel & Kjær range of accelerometer preamplifiers is suitable, the NEXUSTM range of conditioning amplifiers (product data: BP 1702) is recommended because it features a sensitivity adjustment (for convenient output values: 0.1 or 1 V/unit), have a wide frequency range and have adjustable low- and high-pass filters. Connecting a Charge Output If you want to connect a charge output (for example, output from Types 8103, 8104 and 8105) to CCLD input, you can use Charge to CCLD Converter Type 2647 (product data: BP 1874). Discontinued Brüel & Kjær Signal Conditioners The following signal conditioners are no longer manufactured but can be used: Conditioning Amplifier Type 2635, requires a cable terminating with a proprietary connector, referred to as a B&K 7-pin connector such as Cable AO-0390 Measuring Amplifier Type 2525, requires a BNC to TNC adapter such as Adapter JP-0226