ATMOS 14
The ATMOS 14 is designed to measure the following:
• Air temperature
• RH
• Barometric pressure
• Vapor pressure
A rugged design allows the ATMOS 14 to withstand long-term exposure to hostile conditions, making it ideal for a wide range of applications including standard meteorological monitoring, evapotranspiration measurement, greenhouse monitoring and control, and building humidity monitoring for mold prevention and remediation.
Verify that ATMOS 14 and radiation shield (if ordered) appear in good condition.
It pertains specifically to the ATMOS 14 Gen 2, which has replaced ATMOS 14 Gen 1. The two sensor generations can be differentiated by color of the sensor body (Gen 1 is black; Gen 2 is white) and on the heat shrink label on the sensor cable. The ATMOS 14 Gen 2 is a direct drop-in replacement but represents several important improvements over its predecessor
Specifications
Relative Humidity
| Range | 0–100% RH (0.00–1.00) |
| Resolution | 0.10% RH |
| Accuracy | Sensor measurement accuracy is variable across a range of RH. Refer to the chart |
| Equilibration Time (τ, 63%) | <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 to 80 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.2 °C |
| Equilibration Time (τ, 63%) | <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 | 0.01 kPa |
| Accuracy | Sensor measurement accuracy is variable across a range of temperatures and RH. Refer to the chart |
Barometric Pressure
| Range | 1–120 kPa |
| Resolution | 0.01 kPa |
| Accuracy | ±0.05 kPa at 25 °C |
| Equilibration Time (τ, 63%) | <10 ms |
| Long-Term Drift | <0.1 kPa/year, typical |
Communication Specification
Output
DDI Serial or SDI-12 communication
Data Logger Communication
Any data acquisition system capable of 4.0- to 15.0-VDC power and serial or SDI-12 communication.
Physical Specification
Dimensions
| Diameter | 2.0 cm (0.8 in) |
| Height | 5.4 cm (2.1 in) |
Operating Temperature Range
| Minimum | –40 °C |
| Typical | NA |
| Maximum | +80 °C |
Note: Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance.
Cable Length
5m (Standard)
75m (maximum 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
Stereo plug connector or stripped and tinned wires
Stereo Plug Connector Diameter
3.5-mm
Conductor Gauge
22-AWG / 24-AWG drain wire
Electrical and Timing Characteristics
Supply Voltage (VCC to GND)
| Minimum | 4.0 VDC |
| Typical | NA |
| Maximum | 15.0 VDC |
Digital Input Voltage (logic high)
| Minimum | 2.8 V |
| Typical | 3.6 V |
| Maximum | 5.0 V |
Digital Input Voltage (logic low)
| Minimum | -0.3 V |
| Typical | 0.0 V |
| Maximum | 0.8 V |
Digital Output Voltage (logic high)
| Minimum | NA |
| Typical | 3.6 V |
| Maximum | NA |
Power Line Slew Rate
| Minimum | 1.0 V/ms |
| Typical | NA |
| Maximum | NA |
Current Drain (during measurement)
| Minimum | 1.2 mA |
| Typical | 3.5 mA |
| Maximum | 12.0 mA |
Current Drain (while asleep)
| Minimum | NA |
| Typical | 0.03 mA |
| Maximum | NA |
Power Up Time (DDI Serial)
| Minimum | NA |
| Typical | NA |
| Maximum | 110 ms |
Power Up Time (SDI-12)
| Minimum | 140 ms |
| Typical | 260 ms |
| Maximum | 400 ms |
Maximum400 ms Power Up Time (SDI-12, DDI Serial disabled)
| Minimum | NA |
| Typical | 170 ms |
| Maximum | 200 ms |
Measurement Duration
| Minimum | NA |
| Typical | 50 ms |
| Maximum | NA |
Compliance
Manufactured under ISO 9001:2015
2004/108/EC and 2011/65/EU
EN61326-1:2013
EN50581:2012
For inquiries contact us
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