Acoustics & Audio Technology Newsletter Signup
Get the IHS Engineering360
Stay up to date on:
New components, materials and technologies in the fields of sound-recording, reproduction, and abatement.

Sensors to Measure Gas-Borne Sound; CRL 765 Series

Product Announcement from Columbia Research Labs, Inc.

Sensors to Measure Gas-Borne Sound; CRL 765 Series-Image

COLUMBIA's Models 765M25 and 765M27 are High Intensity Acoustic Sensors (Microphones) designed for measurement of gas-borne sound in frequency range of 100Hz to 30KHz, in industrial applications requiring operation up to +500 degrees F. These devices are constructed for use in corrosive environments, which are compatible with 316 stainless steel diaphragm. The all welded construction combined with the isolated hermetic, miniature,10-32 connector (Model 765M25) or the 2 pin stainless steel, hermetic connector (Model765M27) provides a true hermetic seal. Electrically the Models 765M25 & 765M27 comprises sensing elements of piezoceramic material in a balanced and floating configuration to provide enhanced rejection of electrical noise associated with many industrial environments. Optimum performance is achieved when used with a true differential input amplifier.

Specifications: Models 765M25 & 765M27 Transfer/Electrical: Charge Sensitivity: 1200pC/ 1,000pcmb/psi min. Frequency Linearity: ±6dB 100Hz to 25KHz Avg. Temp Coeff. Of Sensitivity: 0.08%/ Deg. F (nominal) Transducer Capacitance: 6,300pF ±10% Insulation Resistance: 100MΩ min., 50VDC test Isolation Resistance: 100MΩ min., 50VDC test Dielectric Strength: 550Vms, 60Hz, Element to housing Environmental: Temp. Range: -23 Deg. C to +260 Deg. C Vibration Limit: 100g's, Max. (sine) Shock Limit: 1,000g's Max. 0.25mSec. Humidity: 0 to 100% Relative Electromagnetic Sensitivity: 0.005 psi (Equivalent / 100 Gauss) Physical: Configuration: Balanced Floating Compression Size: (Model 765M25) - 1.38" Hex. x 1.88" H (Model 765M27) - 1.38" Hex. x 2.1"H Weight: 7.0 oz. / 200 grams Material: Type 316 Stainless Steel (Body and Diaphragm) Electrical Interface: (Model 765M25) - Isolated 10-32 Co-axial Connector:(Model 765M27) - 2-pin MIL-C-5015 Style Connector Mounting: 1.125-12 UNF-2A Thread

Come visit Columbia Research Labs at to view the entire CRL sensor line, or send a request to Our sales and engineering staff will be happy to help find an accelerometer that best fits your needs.

You have successfully added  from  to your part list.
Part Name / #:
Product Type: