The Model 1800/1801 Series sensor is an accelerometer with a body that measures only 7⁄8-in. diameter by 5⁄8-in. high. The sensor is available with two different integral cable configurations: a top-exit connection in the same plane as the sensor (Model 1800), and a side-exit 90-degree connection (Model 1801) designed to save space and reduce the overall height of the installed device. According to the manufacturer, its sensor series features a frequency response of 1 Hz to 15 kHz, at a sensitivity of 100mV/g, and performs reliably in temperature ranges from -65˚ to 250˚ F.
— Vibra-Metrics Inc.