The M351 is a battery-operated precision hydrophone field calibrator. The calibrator can display the hydrophone (HP) sensitivity and/or the sound pressure level (SPL) in the calibration chamber. The M351 is intended to calibrate GTI hydrophones, or can be supplied with a custom interface to support hydrophones from other suppliers.
GTI provides a windows application, Hydrophone (HP) Connection Software, which enables users to update firmware on the field calibrator as well as to view the data stored on the internal EEPROM. Communication with the field calibrator is achieved serially via a USB-B port on the calibrator.
The M351 allows users to easily test their hydrophones before deploying for use. Ocean trials and testing can be costly; having equipment deployed that is dysfunctional and or not accurate can cause inaccurate data collection. This malfunction can cost customers in time and funds. The M351 allows users to test their hydrophones reducing the risk of hydrophone dysfunction and validate hydrophone sensitivity before deploying their monitoring systems.
Hydrophone: M36 & others with similar form factor
Max Diameter of 1.5” (active element in the top 3” of the sensor)
Interface: MCBH-8F on Calibrator
Frequencies: 10, 26, 70, 100, 250Hz
Computation/Display: HP Sensitivity and/or SPL in Box
Reference HP: GTI M2, accuracy ±0.1dB
Calibration Accuracy: ± 0.25dB
Display: Basic 16×2 character LCD
Calibration Data Storage: Internal EEPROM
Software: GTI HP Connection
Communication: Serial via USB-B port on Calibrator
