NH95-250-DR - Restricted Streamer Hydrophone

Click to download the datasheet NH95-DR rev 03.pdf


Hydrophone is a device designed for use in detecting seismic energy in the form of pressure changes under water during marine seismic acquisition. Hydrophones are combined to form streamers that are towed by seismic vessels or deployed in a borehole. Geophones, unlike hydrophones, detect motion rather than pressure. The NH95-250 DR hydrophones are designed for export to countries where there are restrictions on use by government laws. These hydrophones are provided with either normally open or normally close switch. All NH95-250 DR hydrophones are individually calibrated. NH95-250 DR provide a linear frequency response and are omnidirectional over a wide range of frequencies. All our hydrophones have a protection cell; they are completely waterproof, resist corrosion and can withstand very high salinity levels. 


Dimensions : 0.67 inch (17mm) diam. (+/-1mm) 1.38inch (35mm) length (+/-1mm)
 Weight :  0,74 ounce (21 gr.)
Operating temperature :  32°f to 122°f (0°c to 50°c) 
Storage temperature :  -4°f to 176°f (-20°c to 80°c) 
Destruction depth : greater than 500 feet (150m). 
Capacity 16 nf ±5%. 
Impedance greater : than 500 mOhms, in water. 
Sensitivity :  20v / bar +-18% (-194 db) ref: 1v/ µ pa 
Frequency response :  flat from 5 hz to 1 khz. 
Lowest mechanical resonance  : above 4 khz. 
Acceleration output :  less than 1 mV/g due to acceleration in the three major axes


* Built in switch : Normally Open or Normally Close.
* Completely waterproof.
* Very small size
* Depth restricted.
* Rugged construction.
* Long operating life.