Environics, Inc.
Environics is a world leader in computerized gas flow instrumentation. Our headquarters for desig……...

Models SA-207LN and SA-307LN from Columbia Servo Accelerometers are low-noise, high-sensitivity sensors used in seismic and low-level, low-frequency motion research. The accelerometers are self-contained and generate a high-level, low-impedance signal. In most cases, signal conditioning is unnecessary.
These multi-axis sensors, like the single-axis SA-107LN, provide readings in the low-frequency micro-G region. Apart from the usual DC-coupled zero output, the SA-207LN and SA-307LN Accelerometers also provide an AC-coupled zero output that removes tilt-induced or offset errors while also allowing for significant amplification of the fundamental output.
Note: Exports of accelerometers from the United States are subjected to the Export Administration Regulations (EAR) and/or the International Traffic in Arms Regulations (ITAR) authorization procedures.
Two or three axes
Ultra-low noise
Seismic event sensors
High-level output
Specifications
Operational
Table 1. Source: Columbia Research Laboratories, Inc.
| Operational | SA-207LN | SA-307LN |
|---|---|---|
| Ranges Available | +0.1 G to +2 G | +0.5 G to +2 G |
| Output Voltage | +7.5 Volts into 100 K Load | |
| Excitation | +12 to +15 VDC<20 mA | +12 to +15 VDC<30 mA |
| Output Impedance | <1000 Ohms | |
| Sensitive Axis Alignment | Better Than 0.25 Deg | |
| Scale Factor Tolerance | +1% | |
| Scale Factor Temp Coefficient | 0.01% / Deg C Max. | |
| Zero OutputA.C. CoupledD.C. Coupled | <5 mV<1 mG | |
| Null Temp Sensitivity | 75 μV./ Deg C | |
| Natural Frequency | 100 to 200 HzDependent Upon Range | |
| Damping | 0.7 +0.1 | |
| Cross Axis Sensitivity | 0.002 G/G Exclusive of Sensitive Axis Alignment | |
| Output Noise | <2.5 μV RMS From 0 to 50 Hz | |
| Non-Linearity | <+0.1% F.R. | |
| Hysteresis & Non-Repeatability | <0.5 mG | |
| Threshold & Resolution | Better Than 1 μG | |
Environmental
Table 2. Source: Columbia Research Laboratories, Inc.
| Environmental | SA-207LN | SA-307LN |
|---|---|---|
| Temperature, Operating | -40 to +80 Deg C | |
| Temperature, Storage | -50 to +90 Deg C | |
| Vibration Survival (2 to 2,000 Hz) | 5 G RMS, 0.5” Disp D.A. | |
| Shock Survival | 200 G, 5 mSec (1/2 Sine) | |
| Ambient Pressure | 0 to 5 Atmospheres | |
| Humidity | 95% R.H. | |
Physical
Table 3. Source: Columbia Research Laboratories, Inc.
| Physical | SA-207LN | SA-307LN |
|---|---|---|
| Weight | 8 Oz (227 Gm) | 12 Oz (340 Gm) |
| Size | 3.31 In L x 2.80 In W x 2.00 In H(8.4 cm L x 7.1 cm W x 5.1 cm H) | 4.06 In L x 3.13 In W x 2.13 In H(10.3 cm L x 7.9 cm W x 5.4 cm H) |
| Case Material | Anodized Aluminum | |
| Sealing | Environmental | |
| Electrical Interface | 7 Terminal Pins | MS3443412-10P or Equiv. |
| Optional Mating Connector | N/A | PT06A-12-10S(SR) |
SA-207LN Outline

Image Credit: Columbia Research Laboratories, Inc.
SA-307LN Outline

Image Credit: Columbia Research Laboratories, Inc.
Z Option

Image Credit: Columbia Research Laboratories, Inc.
I/O Terminal Pin Functions
Table 4. Source: Columbia Research Laboratories, Inc.
| SA-207LN | SA-307LN | ||
|---|---|---|---|
| Pin | Function | Pin | Function |
| A | +15 VDC | A | +15 VDC |
| B | Ground | B | Ground |
| C | -15 VDC | C | -15 VDC |
| D | DC Output X | D | DC Output X |
| E | AC Output X | E | AC Output X |
| F | DC Output Y | F | DC Output Y |
| G | AC Output Y | G | AC Output Y |
| H | DC Output Z | ||
| J | AC Output Z | ||
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