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instruNet is the Highest-accuracy System with Low-level Measurements
instruNet is the highest-accuracy data acquisition system for performing low-level measurements (e.g. ±100mV), as shown in the below table. Accuracy decreases as you increase sample rate; therefore, when comparing products, compare their accuracy at the same sample rate. The instruNet card cage does not contain a noisy processor, which makes it easier to do accurate low-level measurements.
instruNet is Lowest-cost Standalone system with Universal Inputs
instruNet is the lowest-cost STANDALONE data acquisition system with UNIVERSAL inputs, as shown in the below table. Universal inputs support the direct connection to Voltage, Current, Resistance Thermocouple, Thermistor, Strain Gage, Load Cell, RTD, and Accelerometer sensors; sometimes with the help of one additional shunt resistor. instruNet does this at $124 per channel with an 8-channel system, with unprecedented accuracy.
instruNet is Lowest-cost Card Cage system with Universal Inputs
instruNet is the lowest-cost CARD CAGE system with UNIVERSAL inputs, as shown in the below table. Card cages enable modules to be mixed and matched as needed. The below table is similar to the above table, yet with card cage based systems instead of non-expandable standalone.
instruNet is Lowest-cost Card Cage system with Voltage Inputs
instruNet is the lowest-cost CARD CAGE system with VOLTAGE inputs, as shown in the below table. This is similar to the above table, yet VOLTAGE-only inputs instead of the more expensive UNIVERSAL Inputs.
instruNet is Lowest-cost system with Anti-aliasing Filters
instruNet is the lowest-cost data acquisition system with optional anti-aliasing filters, as shown in the below table. Anti-aliasing filters eliminate errors caused by high frequencies that enter the digitizer, as explained here.
1 Absolute Accuracy Conditions: The system integrates (i.e. averages) for the entire duration of one sample period (e.g. repeatedly read a/d for 10mSec when digitizing at 100s/sec), the data acquisition hardware temperature changed 1°C since its last auto-calibration, and the ambient (e.g. room) temperature is 23°C ± 10C. 2 The USB-9828, and many other Data Translation products, have 0.25uA of input bias current. This current, multiplied by the source impedance, forms an error. For example, a 350 ohm strain gage you will incur an additional error of ±87uV (350*0.25). 3 Total aggregate sample rate for all channels. For example, with 1000s/sec aggregate and 4 channels, each channel is digitized at 250s/sec/channel. 4 The DataQ #DI-718 accuracy is 0.25%, which is approximately 10 times less accurate than instruNet. 5 The NI #USB-9219 maximum sample rate is 100s/sec, which is approximately 20 times slower than instruNet. Also, its cost-per-channel is approximately 3 times higher than instruNet. 6 The NI #USB-6281 is NI's most accurate system, and provides accuracy similar to instruNet, yet its cost-per-channel is 2 times more with 8 channels, and ≥ 3 times more with ≥ 16 channels. 7 The MCC #USB-2404-UI maximum sample rate is 100s/sec, which is approximately 20 times slower than instruNet. Also, its cost-per-channel is 2 times more than instruNet. 8 This system provides voltage-only inputs, and does not support the direct connection to many sensors. 9 "National Instruments" and "LabVIEW" are trademarks owned by National Instruments Corporation of Austin, Texas. This web site is in no way connected to, affiliated with, sponsored by, endorsed by, or otherwise associated with National Instruments Corporation. For detail on their products, which are of high quality, please see www.ni.com. |
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