• Available in ranges from ±1g to ±20g.
• Minimal temperature coefficient of damping ratio.
• Simultaneous filtered and unfiltered outputs.
• Integral temperature compensation.
• DC input and output with isolated signal ground.
• High reliability.

The Sherborne Sensors A640 Series accelerometers utilize MEMS technology to measure vector acceleration with high accuracy. The air damping feature is temperature-independent, and the device includes mechanical stops for shock resistance. Temperature compensation is provided for sensitivity and zero effects. Applications include data acquisition, crash recording, fatigue monitoring, mass transit deceleration control, road bed analysis, and fault detection in railways, as well as use in flight simulators and autopilots.

The A640 series operates from an unregulated DC power supply and features a MEMS sensor with air damping. It includes a military-style bayonet lock connector and a standard 5Hz low pass filter. The output can be biased at 1g to counteract Earth's gravity.

• Input Ranges: ±1g, ±2g, ±3g, ±5g, ±10g, ±20g.
• Input Voltage: +6 to 32Vdc unregulated.
• Input Current: 40mA nominal.
• Output at 25°C: Full Range Output ±5V dc ±2%, Zero Offset ≤ ±2% FRO, Nonlinearity ≤ ±0.5% FRO, Hysteresis ≤ 0.02% FRO, Resolution ≤ 0.0005% FRO, Cross Axis Sensitivity ≤ ±1% FRO, Noise Output 5mV (RMS) max, Damping Ratio 0.7 (±0.2) @ 25°C, Output Impedance < 1Ω, Filtered output response -3dB at 5Hz, 2-pole.

• Operating Temperature: -40°C to +100°C.
• Compensated Temperature: 0°C to +50°C.
• Storage Temperature: -55°C to +130°C.
• Shock: 200g for 2ms (½ sine wave).
• Acceleration: Withstands 20 times rated range in all axes without damage.
• Humidity/Immersion: IP65.
• Insulation Resistance: ≥ 20 MΩ at 50V dc.

• Weight: 120 grams max.

• Connector: Bayonet lock, MIL-C-26482, 6 pin, Shell Size 10.
• Pin Assignments: A – supply +, B – supply 0v, C - signal ground, D - signal output (filtered), E - signal output (unfiltered), F – not connected.