820M1-0025

## 820M1 CONDITION MONITORING ACCELEROMETER 

## SPECIFICATIONS 

- **Piezoelectric Accelerometer** 

- **±25g to ±500g Dynamic Ranges** 

- **Wide Bandwidth to 10,000Hz** 

- **Superior Resolution to MEMS Devices** 

- **Circuit Board Mountable, Reflow Solderable** 

- **Low Cost, Superior Value** 

## FEATURES 

- Amplified ±1.25V Signal Output 

- 3.0 to 5.5Vdc Excitation Voltage 

- Hermetically Sealed 

- Piezo-Ceramic Crystal, Shear Mode 

- -40° to +125°C Operating Range 

## APPLICATIONS 

- Machine Health Monitoring 

- Predictive Maintenance Installations 

- Embedded Vibration Monitoring 

The Model 820M1 is a low cost, board mountable accelerometer designed for embedded condition monitoring and preventive maintenance applications. The piezo-electric accelerometer is available in ranges from ±25g to ±500g and features a flat frequency response up to >10kHz. The model 820M1 accelerometer feature a stable piezo-ceramic crystal in shear mode with low power electronics, sealed in a fully hermetic LCC package. 

The PE technology incorporated in the 820M1 accelerometer has a proven track record for offering the reliable and long-term stable output required for condition monitoring applications. The accelerometer is designed and qualified for machine health monitoring and has superior Resolution, Dynamic Range and Bandwidth to MEMS devices. 

- Impact & Shock Monitoring 

- Data Loggers 

- Bearing Installations 

TE CONNECTIVITY SENSORS /// Model 820M1 Rev B                                           04/2019 

MODEL 820M1 ACCELEROMETER 

## PERFORMANCE SPECIFICATIONS 

All values are typical at +24°C, 80Hz and 3.3Vdc excitation unless otherwise stated.  TE Connectivity reserves the right to update and change these specifications without notice. 

## Parameters 

|Parameters||||||||
|---|---|---|---|---|---|---|---|
|**DYNAMIC**|||||||Notes|
|Range (g)||±25|±50|±100|±200|±500||
|Sensitivity (mV/g)||50.0|25.0|12.5|6.3|2.5|±30%|
|Frequency Response (Hz)||6-6000|6-6000|6-6000|6-6000|6-6000|±1dB|
|Frequency Response (Hz)||2-10000|2-10000|2-10000|2-10000|2-10000|±3dB (see note 1 below)|
|Resonant Frequency (Hz)||>30000|>30000|>30000|>30000|>30000||
|Non-Linearity (%FSO)||±2|±2|±2|±2|±2||
|Transverse Sensitivity (%)||<5|<5|<5|<5|<5|Typical|
|Shock Limit (g)||10,000|10,000|10,000|10,000|10,000||
|Residual Noise (mg RMS)||6.3|12.4|15.9|24.7|39.9|2Hz to 10kHz|
|Spectral Noise, 10Hz (µg√Hz)||98|193|248|384|620||
|Spectral Noise, 100Hz (µg√Hz)||51|101|130|201|324||
|Spectral Noise, 1kHz (µg√Hz)||45|89|114|176|285||
|**ELECTRICAL**||||||||
|Excitation Voltage (Vdc)||3.0 to 5.5 (see note 2 below)||||||
|Bias Voltage (Vdc)||Excitation Voltage / 2||||||
|Full Scale Output Voltage (V)||±1.25||||||
|Total Supply Current (µA)||62||||||
|Output Impedance (Ω)||<100||||||
|Warm-up Time (sec)||<1||||||
|**ENVIRONMENTAL**||||||||
|Temperature Response (%)||See Typical Temperature Response Curves on Page 3|See Typical Temperature Response Curves on Page 3||See Typical Temperature Response Curves on Page 3|||
|Operating Temperature (°C)|Operating Temperature (°C)|-40 to +125||||||
|Storage Temperature (°C)||-40 to +125||||||
|Humidity||Hermetically Sealed|Hermetically Sealed|||||
|**PHYSICAL**||||||||
|Sensing Element||PZT (Lead Zirconate Titanate), Shear Mode|||PZT (Lead Zirconate Titanate), Shear Mode|||
|Case Material||Ceramic Base and Kovar Cover||||||
|Weight (grams)||1.2||||||
|Mounting||Solder Reflow||||||
|**Calibration supplied:**|CS-SENS-0100||NIST Traceable Amplitude Calibration at 80Hz|NIST Traceable Amplitude Calibration at 80Hz||||



1 Proper mounting is critical for good performance to 10kHz. See operating manual for recommended installation instructions. 

2 The model 820M1 can be operated with 2.8V excitation but the full-scale range will be limited. See operating manual for details. 

The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the manufacturer. TE Connectivity reserves the right to make changes without further notice to any product herein. TE Connectivity makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does TE Connectivity assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different applications. All operating parameters must be validated for each customer application by customer’s technical experts. TE Connectivity does not convey any license under its patent rights nor the rights of others. 

TE CONNECTIVITY SENSORS /// Model 820M1 Rev B                                           04/2019 

MODEL 820M1 ACCELEROMETER 

## BIAS TEMPERATURE SHIFT 

**==> picture [465 x 241] intentionally omitted <==**

**----- Start of picture text -----**<br>
Thermal Bias Shift (typical)<br>2.50<br>2.48<br>2.46<br>2.44<br>2.42<br>2.40<br>2.38<br>2.36<br>2.34<br>2.32<br>2.30<br>-60 -40 -20 0 20 40 60 80 100 120 140<br>Temp (°C)<br>Bias (V)<br>**----- End of picture text -----**<br>


## SENSITIVITY TEMPERATURE SHIFT 

Thermal Sensitivity Shift (typical) 

**==> picture [471 x 255] intentionally omitted <==**

**----- Start of picture text -----**<br>
10.00<br>8.00<br>6.00<br>4.00<br>2.00<br>0.00<br>-2.00<br>-4.00<br>-6.00<br>-8.00<br>-10.00<br>-60 -40 -20 0 20 40 60 80 100 120 140<br>Temp (°C)<br>TSS (%)<br>**----- End of picture text -----**<br>


TE CONNECTIVITY SENSORS /// Model 820M1 Rev B                                           04/2019 

MODEL 820M1 ACCELEROMETER 

## DIMENSIONS 

## SCHEMATIC 

TE CONNECTIVITY SENSORS /// Model 820M1 Rev B                                           04/2019 

MODEL 820M1 ACCELEROMETER 

## ORDERING INFORMATION 

## **820M1-GGGG** 

l_______ **Range** (0100 is 100g) 

|**Part Number**|**Range**|
|---|---|
|820M1-0025|25g|
|820M1-0050|50g|
|820M1-0100|100g|
|820M1-0200|200g|
|820M1-0500|500g|



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The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. 

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TE CONNECTIVITY SENSORS /// Model 820M1 Rev B                                           04/2019