Pace Scientific develops and manufactures data loggers and sensors. Our four channel XR440 Pocket Logger® works with over 50 direct connect sensors, including Temperature, Relative Humidity, High Pressure, Low Pressure, AC Current, DC Current, AC Voltage, Power, Light, Solar Radiation, Soil Moisture, with no external power!
The XR440 reads 0-5v signals, resistances, and contact closures. Plug-in modules read 4-20ma and other voltages, thermocouple and millivolt signals, and relative humidity and temperature. An external module accepts pulses. Any combination of four Pace sensors can be used with the XR440 data logger. Battery life with any mix of connected sensors is typically 2 to 3 years!