ATMOS 14
Tech Specs
TECHNICAL SPECIFICATIONS
Measurement Specifications
Relative Humidity (RH)
Range: 0 – 100 % RH (0.00-1.00)
Resolution:Â 0.10% RH
Accuracy:Â Sensor measurement accuracy is variable across a range of RH. See specification chart.
Equilibration Time (Ï„, 63%):Â < 25 s (response time in 1 m/s air stream)
Hysteresis: ±0.80% RH, typical
Long-term Drift: ±0.25% RH/year, typical
Temperature
Range: -40.00 – 80.00 °C
Resolution: 0.1 °C
Accuracy: ±0.20 °C
Equilibration Time (Ï„, 63%):Â < 165 s (response time in 1 m/s air stream)
Long-term Drift: < 0.03 °C/ year, typical
Vapor Pressure
Range: 0 – 47 kPa
Resolution:Â 0.01 kPa
Accuracy: Sensor measurement accuracy is variable across a range of temperatures and RH. See specification chart.
Barometric Pressure
Range: 1 – 120 kPa
Resolution:Â 0.01 kPa
Accuracy: ±0.05 kPa at 25 °C
Equilibration Time (Ï„, 63%):Â < 10 ms
Long-term Drift:Â < 0.1 kPa/year, typical
Communication Specifications
Output
DDI serial or SDI-12 communication
Data Logger Compatibility
Any data acquisition system capable of 4.0- to 15.0-VDC power and serial or SDI-12 communication.
Physical Specifications
Dimensions
Diameter:Â 2.0 cm (0.8 in)
Height:Â 5.4 cm (2.1 in)
Operating Temperature Range
Minimum: -40.00 °C
Maximum: 80.00 °C
NOTE: Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance.
Cable Length
5 m (standard)
75 m (maximum custom cable length)
75 m (maximum custom cable length)
Cable Diameter
0.165 ±0.004 in (4.20 ±0.10 mm), with minimum jacket of 0.030 in (0.76 mm)
Connector Types
3.5-mm stereo plug connector or stripped and tinned wires
Conductor Gauge
22-AWG / 24-AWG drain wire
Electrical and Timing Characteristics
Supply Voltage (VCC to GND)
Minimum:Â 4.0 VDC
Maximum:Â 15.0 VDC
Digital Input Voltage (Logic High)
Minimum:Â 2.8 V
Typical:Â 3.6 V
Maximum:Â 5.0 V
Digital Input Voltage (Logic Low)
Minimum:Â -0.3 V
Typical:Â 0.0 V
Maximum:Â 0.8 V
Digital Output Voltage (Logic High)
Minimum:Â NA
Typical:Â 3.6 V
Maximum:Â NA
Power Line Slew Rate
1.0 V/ms
Current Drain (During Measurement)
Minimum:Â 1.2 mA
Typical:Â 3.5 mA
Maximum:Â 12.0 mA
Current Drain (While Asleep)
Minimum:Â NA
Typical:Â 0.03 mA
Maximum:Â NA
Power Up Time (DDI Serial)
Minimum:Â NA
Typical:Â NA
Maximum:Â 110 ms
Power Up Time (SDI-12)
Minimum:Â 140 ms
Typical:Â 260 ms
Maximum:Â 400 ms
Power Up Time (SDI-12, DDI Serial Disabled)
Minimum:Â NA
Typical:Â 170 ms
Maximum:Â 200 ms
Measurement Duration
Minimum:Â NA
Typical:Â 50 ms
Maximum:Â NA
Other
Compliance
GSA
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