Air Monitoring Sensor Information

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Temperature and Humidity

Instrument Type: Campbell Scientific CS215-L Temperature and Relative Humidity Sensor

Installed: 16 October 2013 to present

Temp ProbeDescription:The CS215 probe uses a single chip element that incorporates both a temperature and RH sensor. Each element is individually calibrated with the calibration corrections stored on the chip. The probe is fitted with a low-cost sintered plastic filter to minimize the effects of dust and dirt on the sensor. The filter is lightweight and hydrophobic, thereby minimizing the effect of the time response of the sensor.

Location: Weather box, 40 m from coastal bluff
Latitude 38° 19' 01.52" N
Longitude 123° 04' 18.41" W

Specifications:

Humidity Sensor (CS215-L Temperature and Relative Humidity Sensor)
Range: 0 to 100% RH
Accuracy: 10% to 90% range: ±2% RH; 0% to 100% range: ±4% RH
Repeatability: 0.3% RH
Response Time: 20 sec

Temperature Sensor (CS215-L Temperature and Relative Humidity Sensor)
Range: -40 to +70 °C
Accuracy: 25°C: ±0.3°C; +5° to +40°C: ±0.4°C; -40° to +70°C: ±0.9°C
Repeatability: 0.1 °C
Response Time: 120 sec

Acquisition Settings:
Instantaneous
Data stored at 5 second intervals

Instrument Type: Rotronic MP101A Humidity Temperature Probe

Installed: 4 July 2003 - 16 October 2013

Former Temp probeDescription: A thin-film, capacitive humidity sensor and a platinum resistance temperature detector housed in a radiation shield; temperature sensor used automatically to compensate for the effect of temperature on humidity measurements

Location: Weather box, 40 m from coastal bluff
Latitude 38° 19' 01.52" N
Longitude 123° 04' 18.41" W

Specifications:

Humidity Sensor (Rotronic Hygromer C94)
Range: 0 to 100% RH
Accuracy: 1% RH at 20-25 °C
Repeatability: 0.3% RH
Response Time: 10 sec

Temperature Sensor (Pt100 RTD)
Range: -40 to +60 °C
Accuracy: 0.3 °C
Repeatability: 0.1 °C
Response Time: 10 sec

Acquisition Settings:
30 second running average
Mean value logged every 5 seconds
Data stored at 10 second intervals

Barometric Pressure

Instrument Type: Vaisala PTB210 Digital Barometer

barometric pressure sensorInstalled: 19 July 2007 - Current

Description: Uses the Vaisala BAROCAP Sensor, a silicon capacitive absolute pressure sensor. Sensor provides excellent hysteresis and repeatability characteristics and outstanding temperature and long- term stability. All PTB210 barometers are delivered with a factory calibration certificate which is NIST traceable.

Location: Weather box, 40 m from coastal bluff
Latitude 38° 19' 01.52" N
Longitude 123° 04' 18.41" W

Specifications:
Range: 500 – 1100 mb
Resolution: 0.01 mb
Accuracy: at +20 °C (+68 °F) ± 0.15 mb - ± 0.35 mb

Acquisition Settings:
Data stored at 10 second intervals
Normal operating mode (measures continuously when powered)

Instrument Type: Vaisala PTB101B Barometric Pressure Sensor

Installed: 13 February 2007 - 19 July 2007

barometric pressure sensorDescription: Uses the Vaisala BAROCAP Sensor, a silicon capacitive absolute pressure sensor. Designed for general environmental pressure monitoring over a wide temperature range, the sensor has excellent long-term stability.

Location: Weather box, 40 m from coastal bluff
Latitude 38° 19' 01.52" N
Longitude 123° 04' 18.41" W

Specifications:
Range: 600 – 1060 mb
Resolution: 0.1 mb
Accuracy: ±1.5 mb at 0 – 40 °C

Acquisition Settings:
Data stored at 10 second intervals
Normal operating mode (measures continuously when powered)

Instrument Type: YSI 2014 Barometric Pressure Transducer

Installed: 10 September 2003 - 19 July 2007

barometric pressure sensorDescription: Aneroid barometer using an evacuated bellows (sensitive to changes in absolute pressure) that is mechanically connected to the arm of a resistance potentiometer

Location: Latitude 38° 19' 03.35" N
Longitude 123° 04' 17.20" W

Specifications:
Range: 28 to 32 inches Hg
Resolution: 0.15% of range span (0.006 inches Hg)
Accuracy: 0.3% of range span ( 0.012 inches Hg)

Acquisition Settings:
Data stored at 10 second intervals