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Dynamite Sampler Lite

Dynamite Sampler Lite

Wireless loadcell interface

$208.00 CAD
$208.00 CAD
Sale Sold out

Dynamite Sampler Lite vs Pro Comparison Table

The Pro allows for very sensitive measurements and force derivatives by having an incredibly high dynamic range and low noise.

The Lite is a small and economical variant with a higher noise floor.

Both offer the same BLE connectivity and the same user-friendly app on mobile and web.

Lite Pro
DISTINCT FEATURES
RMS Noise with a 100kg Load cell [1] 16 g 1 g
Dynamic range, with a 350 ohm 2mV/V LC 76 dB 100 dB
Voltage noise, shorted inputs, 1ksps 788 nV rms 67 nV rms
Size 64mm x 41mm x 12 mm 79mm x 104mm x 24mm
Enclosure Plastic Aluminum
Weight 20 g 110 g
Load cell excitation voltage 2.8 V 4.53 V
Max mV/V sensitivity before clipping 13m V/V 2.62m V/V
GPIO None 13 + TX/RX
COMMON FEATURES
Connectivity BLE (Bluetooth 5.0+ required)
Sampling rate 1000 Hz
Channels 4 Channels, simultaneous sampling
Power input USB-C
Load cell connection 2-part Screw block terminal, hot-swappable and disconnectable
Calibration Ratiometric, just values, not temp
Resolution 24 bits
Software Identical open source firmware, API, and app

The Dynamite Sampler Pro is a load cell interface with 4-channel, true simultaneous sampling at 1kHz.

Low noise floor: 16 gram RMS noise with a 100kg load cell. (350 ohm LC, grounded, 1kHz data, no low pass filtering).

Built-in high quality excitation (2.8V).

Open source firmware. https://github.com/K3Engineering/dynamite-sampler-firmware
Open source app. You can test drive it here (no device required) dynamite-app.k3engineering.com 

[1] 350 ohm LC, grounded, 1kHz data, no low pass filtering, not equalized.

Feature Specification Notes
Physical Characteristics
Size 64 mm x 41 mm x 12 mm
Enclosure Plastic
Weight 20 g
Load cell connection 4-wire screw block terminal, 2-part disconnectable
Mounting bolts M3
Mount point measurements 56 mm x 28 mm
Electrical Characteristics
Signal input range, mV ±37 mV
Signal input range, mV/V 13 mV/V
Gain 32x
Load cell excitation voltage 2.8V
Max EXC+ current 300 mA Shared across all 4 channels
Voltage noise, shorted inputs, 1 ksps 788 nV rms
Dynamic range, with a 350-ohm 2 mV/V LC 76 dB Calculated as 20·log₁₀(V_FS / V_noise,rms)
PSRR, 10 Hz to 10 MHz TBD
CMRR, 10 Hz to 10 MHz TBD
Allan plot valley 43 nV at 3 seconds
Calibration Yes 5-point ratiometric (LC simulator, mV/V), at a single logged temperature
Temperature sensor No
Temperature stability Typ. 200 nV/°C
GPIO No
EMI filtering Advanced multi-stage Can support a phone and a walkie-talkie as close as 1 inch away from the device
ESD All pins, including input
Power consumption, streaming, no LCs attached 50 mA avg. at 5V
Accuracy ±0.2% (calibrated from factory, calibration auto-applied) Device streams raw data; calibration is stored in flash and sent over before streaming
Microphonic effect (motion converted into signal) No measurable effect No measurable effect on signal in coarse testing
Min input voltage 4V
Digital Characteristics
Connectivity BLE (Bluetooth 5.0+ required)
Sampling rate 1000 Hz Raw ADC values, no filtering or EQ. ADC uses sinc3+sinc1 decimation internally. Analog AA filter does not impact 1 ksps sampling speed.
Channels 4 channels, simultaneous sampling
Power input USB-C
Resolution 24-bit
ADC decimation filter's -3 dB point at 1 ksps (calculated) 448 Hz Note that the hardware AA filter's -3 dB point is at 8 kHz
Software
GUI compatibility Chrome and Bluefy only for the web app; native Android and iOS apps
GUI functionality Live plotting, gap detection, derivative plotting, recording, exporting to CSV, OTA updates
API Python
Software availability OSS: app, Python API, and firmware
Firmware updates Through the app; saved data is preserved
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Load cell Interfaces