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Enabling better global research outcomes in soil, plant & environmental monitoring.

SB-100

Apogee barometric pressure sensors combine a wide pressure measurement range, wide operating temperature range, high accuracy, low power use, and low cost into a small, rugged package. These sensors are ideal for continuous barometric pressure measurement on weather stations and providing routine pressure measurements for correction of sensor outputs that are sensitive to barometric pressure fluctuations (for example, Apogee oxygen sensors).

  • Less than 1.5 % error over a pressure range of 15 to 115 kPa (4.43 to 33.96 in Hg)
  • Operates over a wide temperature range, -40 to 125°C (-40 to 257 °F)
  • High voltage output (0 to 5 V) linearly proportional to barometric pressure
  • Low power use, less than 50mW
  • Simple, compact, rugged design
SPECIFICATIONS
Measurement Range 15 to 115kPa (approximate)
Maximum Pressure Exposure 400kPa (Exposure beyond this limit may cause permanent damage to sensor)
Sensitivity 45.9mV per kPa; 0.459mV per 0.01kPa (approximate)
Calibration Factor 0.0218kPa per mV (generic slope; reciprocal of sensitivity) and 11.4kPa (generic intercept)
Measurement Uncertainty ±1.5 % (with generic calibration coefficients)
Measurement Repeatability < 0.1%
Non-stability (Long-term Drift) < 1% per year
Non-linearity < 1%
Warm-up Time 20 ms
Response Time 1 ms
Temperature Response 0.1% per °C
Operating Environment -40 to 125 °C
0 to 100% relative humidity (non-condensing)
Input Voltage Requirement 5V DC
Output Voltage Range 0 to 5V DC
Current Drain 7 mA DC
Dimensions 1.6cm Diameter
Mass 5g
Cable 12cm pigtail

Apogee SB-100 barometric pressure sensors are designed to be mounted inside the datalogger enclosure, where they are protected from the elements, specifically, precipitation, condensation and dynamic pressure caused by wind. Lead wires are short and allow the sensor to remain near the datalogger wiring panel. The datalogger enclosure should not be air tight, as the pressure sensor must be exposed to an environment where the pressure varies with ambient pressure. As a result, vent hoses in the enclosure are required and should be in the bottom of the enclosure to minimize the impact of dynamic pressure caused by wind.