Piezoelectric Accelerometer for Cryogenic Services in Cold Temperatures

The Model 876 Piezoelectric Accelerometer from Columbia Research Laboratories has been designed for vibration measurement or tracking applications that need operation at extremely cold temperatures.

The accelerometer is ideal for event and vibration tracking of valves and pumps applied in the cryogenic service.

The shear plate construction offers utmost mechanical isolation from thermal shock transients and strain-induced inputs. The electrically separated and double case construction provides electrostatic shielding as well as decreasing power line frequency noise due to multi-point grounding. The accelerometer equips a 10 to 32 top connector.

Users can consult the factory for tailored versions of this sensor.

Piezoelectric Accelerometer for Cryogenic Services in Cold Temperatures

Image Credit: Columbia Research Laboratories

Extreme cold temperatureVibration and shock measurements

Electrical isolation

Sealed hermetically

Low base strain sensitivity

Specifications

Source: Columbia Research Laboratories

Transfer / Electrical	876
Charge Sensitivity¹@ 75 Deg F Nominal@ -420 Deg F to –295 Deg F	50 +/-10 pC/g25 pC/g +/-5%
Capacitance@ 75 Deg F Nominal@ -420 Deg F To –295 Deg F	4,200 +/-100 pF1,700 pF +/-5%
Frequency Linearity²	+/-5% Max2 Hz To 4,000 Hz
Mounted Resonant Frequency	20 KHz, Min.
Transverse Sensitivity	5% Max
Amplitude Linearity	+/-1.0% (BFSL) / 2,000 g
Insulation Resistance	10,000 M Ohm Min, 50 VDC Test
Isolation Resistance	50 M Ohm, Min.Housing to Signal Output Terminals Shorted

Environmental	876
Vibration Limit	3,000 g Max (Sine)
Shock Limit	10,000 g Peak ½ Sine
Temperature Range	-450 To +300 Deg F (-267 To +149 Deg C)
Humidity³	0 To 100% R.H.
Base Strain Sensitivity	0.005 g/μE Equiv, Typical
Electromagnetic Sensitivity	0.005 g (Equiv / 100 Gauss)
Acoustic Sensitivity	1.0 g Max @ 170 dB Whitenoise 75 To 960 Hz

Physical	876
Configuration	Bolted Shear Plate
Size	0.625 In. Hex. x 1.000 In. H (15.9 mm Hex x 25.4 mm H)
Weight	1.2 Oz (33 Gm)
Case Material	18-8 Stainless Steel
Electrical Interface	Coaxial 10-32 Thread
Mounting	10-32 UNF Tapped Base

Notes:

¹ At +75 Deg F, 10 g Peak, 100 Hz; Lower Frequency Limit is Determined by Associated Electronics² Referenced to Sensitivity @ 100 Hz.³ Unit is Hermetically Sealed.

Accessories Supplied

Mounting Stud, St Stl measures around 10-32 x 0.5

Standard room temperature calibration data

Comes with a hardwood storage case

Provided with a Certificate of Calibration Traceable to N.I.S.T.

Optional Accessories

Low temperature calibration data

标签：Temperature Measurement Equipment Thermal Analysis

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