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ACC 1821-SxLx

Uniaxial Accelerometer
IEPE piezoelectric acceleration sensor, internal charge amplifier.
Power supply and signal output share a cable, commonly known as two-line system, that is, coaxial cable to supply 2-10mA constant current power supply to the sensor, and the output signal is also output by the coaxial cable, known internationally as ICP mode.
The ACC 1821-S3L1 is often paired with built-in IEPE acquisition cards such as MegaSig PM 6143 for excellent test results.

Description
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Description

Specifications

Parameter	Value
Sensitivity Grade	S3
Factory Sensitivity	10mV/g（±10%）
Range (g)	±500g
Frequency Response	0.5Hz - 10kHz（±5%） 0.3Hz - 15kHz（±10%）
Max Transverse Sensitivity	≤5%
Amplitude Linearity	≤1%
Broadband Resolution	0.0001grms
Mounted Resonance Frequency	＞40kHz
Shock Resistance	3kg
Operating Voltage Range	+18V - +28V
Operating Current Range	2mA - 10mA（Typical 4mA）
Operating Temperature Range	-40℃ - 120℃
Broadband Noise	4000μg
Frequency Noise (μg/√Hz)	10Hz：250 100Hz：65 1000Hz：35
Base Strain	0.002g/με
Magnetic Sensitivity	1.5g/T
Sensing Element	Piezoelectric Ceramics
Housing Material	Titanium alloy
Structure Type	Shear type
Weight	≤5.5g
Output Connector	M5
Output Connector Position	可选L1（侧端出线）或L2（顶端出线）
Mounting Interface	Bottom M5 Thread
Accessories	M5连接螺栓

Specifications

We have continuously optimized our production processes, consistently improved product quality, refined the specifications for the 1821 series, and updated the specification document as follows:

ACC 1821-SxLx
Sensitivity Level	S3	S5
Factory Sensitivity	10mV/g（±10%）	100mV/g（±10%）
Measurement Range	±500g	±50g
Frequency Response	0.5Hz - 10kHz（±5%） 0.3Hz - 15kHz（±10%）	0.5Hz - 10kHz（±5%） 0.3Hz - 15kHz（±10%）
Transverse Sensitivity	≤5%	≤5%
Non-Linearity	≤1%	≤1%
Broadband Resolution	0.0001grms	0.0001grms
Resonant Frequency	＞40kHz	＞40kHz
Overload Limit (Shock)	3000g	2000g
Working Voltage	+18 - ＋28V	+18 - ＋28V
Working Current	2mA - 10mA（Typical 4mA）	2mA - 10mA（Typical 4mA）
Working Temperature	-40℃ - 120℃	-40℃ - 120℃
Sensitivity temperature coefficient	-1%/℃	-1%/℃
Broadband Noise	4000μg	550μg
Spectral Noise	10Hz：250(μg/√Hz) 100Hz：250 (μg/√Hz) 1000Hz：35 (μg/√Hz)	10Hz：57(μg/√Hz) 100Hz：18 (μg/√Hz) 1000Hz：5.7 (μg/√Hz)
Base Strain Sensitivity	0.002g/με	0.002g/με
Magnetic Sensitivity	1.5g/T	1.5g/T
Sensing Element	Piezoelectric Ceramics	Piezoelectric Ceramics
Housing Material	Titanium	Titanium
Sensing Geometry	Shear	Shear
Weight	≤5.5g	≤5.5g
Electrical Connector	M5	M5
Electrical Connection Position	L1(Side) or L2(Top) is optional	L1(Side) or L2(Top) is optional
Mounting Thread	M5 Female	M5 Female
Accessory	M5 Bolt	M5 Bolt

Note: Unless otherwise specified, the default environmental conditions are: 1 standard atmosphere, 26 degrees Celsius, and 55% relative humidity

Model Description

Dimensions：mm

ACC 1821-SxLx (2) - 副本.png

ACC 1821-S5 typical sensitivity temperature response curve

ACC 1821-S5-灵敏度.png

The 1821 series products shipped after July 24, 2025, will comply with the specifications outlined in the new specification document.

Note: During use, if the sensitivity fluctuation exceeds 10% compared to the factory-set value, it is recommended to return the product to the factory for inspection.