ATMOS 14

Temperature and Humidity Sensor and More

The ATMOS 14 will rapidly and reliably measure air temperature, relative humidity, barometric pressure, and vapor pressure, making benchmarking between sensors quick and hassle free.

Four measurements in one sensor
Collect data remotely when used with the ZL6 data logger
Fast response

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Overview / Features

Microclimate monitoring made simple

If you’re doing a microclimate or evapotranspiration study, you may need up to four extra sensors to get important measurements that will benchmark your data. Not to mention facing the hassle of getting all those sensors integrated into your system. What you need is something simpler. Meet ATMOS 14.

With the ATMOS 14, all your bases are covered

We engineered the ATMOS 14 temperature and humidity sensor to be four sensors in one—air temperature, relative humidity, barometric pressure, and vapor pressure. It’s a versatile, low-maintenance, and fast sensor designed to make temp/RH measurements simpler and less work. And best of all, it’s plug and play with our ZL6 data logger.

A temperature and humidity sensor you can plug in, and walk away

While other sensors require wiring and programming, the ATMOS 14 simply plugs into the ZL6 (It’s also compatible with third-party data loggers). There’s no having to figure out complicated instructions. Just mount the sensor on your data logger mast, plug it in, and walk away.

Rapid readings

Because the ATMOS 14 temperature and humidity sensor is plug and play, setup is quick. And responses are equally fast. Thanks to a Teflon protection screen that keeps liquid water out, but vapor moving freely through, it responds rapidly while keeping dust and liquid water off the sensor. Both features add up to time saved.

Compact, weatherproof, and low maintenance

The ATMOS 14 temperature and humidity sensor is low-maintenance. It gives accurate vapor pressure and RH without a lot of cleaning. Plus it’s weatherproof, meaning it will last a long time in the field. Its compact shape fits into tight spaces, leaving room on a mast for other sensors.

Measure more. Work less.

With ATMOS 14, all your basic microclimate measurements are covered using a small, simple integrated sensor. Thousands of engineers and ecologists depend on the ATMOS 14 temperature and humidity sensor for straightforward measurements. Whether you’re using it to look at plant emergence, leaf area index, or fractional interception, there isn’t an easier way to benchmark your data for.

Feature summary

Four measurements in one sensor
Plug and play capability
Collect data remotely when used with the ZL6 data logger
Compact
Teflon screen protects the sensor from weather
Fast response
Integrated temperature for accuracy

Specifications: TECHNICAL SPECIFICATIONS

Measurement Specifications

Relative Humidity (RH)

Range: 0 – 100 % RH (0.00–1.00)

Resolution: 0.10% RH

Accuracy: Sensor measurement accuracy is variable across a range of RH. See specification 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: -40–80 °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. See specification 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 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: 2.0 cm (0.8 in)

Height: 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)

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: 4.0 VDC

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

1.0 V/ms

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

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

Other

Compliance

Prop 65 warning

GSA

View GSA details

Support / FAQ

Atmos 14 User Manual (Gen 2)

Atmos 14 Integrator Guide (Gen 2)

Integrator Guide

PDF, 0.7 MB

Atmos 14 / VP-4 Firmware Updater

Firmware

EXE, 1.3 MB

Atmos 14/VP-4 CSI Example Program

Instructions

URL, 0 MB

VIDEO: ZL6 + ZENTRA Cloud Troubleshooting

Instructions

URL

METER Splice Kit Repair Instruction Video

Instructions

URL, 0.0 kb

Sensor wire splicing guide (complete method)

Instructions

PDF, 5MB

Sensor wire splicing guide (quick method)

Instructions

PDF, 0.9MB

Video: How to Set Up the Quick Deploy Tripod

Instructions

URL, 0.0 kb

Atmos 14 User Manual (Gen 1)

Manual

PDF, 0.23MB

Atmos 14 Integrator Guide (Gen 1)

Integrator Guide

PDF, 0.1 MB

Atmos 14 RH/Temperature/Barometric Pressure Daughterboard Replacement

Instructions

PDF, 0.47 Mb

ATMOS 14 FAQs

Is the ATMOS 14 sensor chip/board removable?: The ATMOS 14 Gen 2 sensor/chip board is removable. See the ATMOS 14 Relative Humidity daughterboard replacement video for instructions. In the ATMOS 14 Gen 1, the sensor chip/board is not removable. The Teflon and Screen could be replaced. Contact METER for information. Long-term drift is stated in the manual. The ATMOS 14 shouldn’t need to be checked for drift until two years of field use. There are instructions in the manual about checking relative humidity drift. The cost to recalibrate ATMOS 14 sensors at METER is about $100-$120.

Resources / Publications

Resources

Educational links

Support links

Case studies

Selected Publications

In 2015, the VP4 changed its name to the ATMOS 14, but they are the same sensor.

2020

Carrasco-Benavides, Marcos, Javiera Antunez-Quilobrán, Antonella Baffico-Hernández, Carlos Ávila-Sánchez, Samuel Ortega-Farías, Sergio Espinoza, John Gajardo, Marco Mora, and Sigfredo Fuentes. “Performance Assessment of Thermal Infrared Cameras of Different Resolutions to Estimate Tree Water Status from Two Cherry Cultivars: An Alternative to Midday Stem Water Potential and Stomatal Conductance.” Sensors 20, no. 12 (2020): 3596. (Article link).
Fontanet, Mireia, Elia Scudiero, Todd H. Skaggs, Daniel Fernàndez-Garcia, Francesc Ferrer, Gema Rodrigo, and Joaquim Bellvert. “Dynamic Management Zones for Irrigation Scheduling.” Agricultural Water Management 238 (2020): 106207. (Article link).
Li, Bo, Bijiao Shi, Zhenzhu Yao, Manoj Kumar Shukla, and Taisheng Du. “Energy partitioning and microclimate of solar greenhouse under drip and furrow irrigation systems.” Agricultural Water Management 234 (2020): 106096. (Article link).
Muffler, Lena, Robert Weigel, Andrew J. Hacket‐Pain, Marcin Klisz, Ernst van der Maaten, Martin Wilmking, Juergen Kreyling, and Marieke van der Maaten‐Theunissen. “Lowest drought sensitivity and decreasing growth synchrony towards the dry distribution margin of European beech.” Journal of Biogeography (2020). (Article link).
Obia, Alfred, Gerard Cornelissen, Vegard Martinsen, Andreas Botnen Smebye, and Jan Mulder. “Conservation tillage and biochar improve soil water content and moderate soil temperature in a tropical Acrisol.” Soil and Tillage Research 197 (2020): 104521. (Article link).
Sanchez, Olivia, Stephanie E. Burnett, and Bryan J. Peterson. “Environment, Photosynthesis, and Adventitious Rooting of Manchurian Lilac Cuttings Propagated in Overhead Mist, Submist, and Combination Systems.” HortScience 55, no. 1 (2020): 78-82. (Article link).

2019

Barba, Josep, Rafael Poyatos, and Rodrigo Vargas. “Automated measurements of greenhouse gases fluxes from tree stems and soils: magnitudes, patterns and drivers.” Scientific Reports 9, no. 1 (2019): 1-13. (Article link).
Gong, Xue-Wei, Guang-Hui Lü, Xue-Min He, Binoy Sarkar, and Xiao-Dong Yang. “High air humidity causes atmospheric water absorption via assimilating branches in the deep-rooted tree Haloxylon ammodendron in an arid desert region of Northwest China.” Frontiers in Plant Science 10 (2019): 573. (Article link).

2017

Martin, Justin, Nathaniel Looker, Zachary Hoylman, Kelsey Jencso, and Jia Hu. “Hydrometeorology organizes intra‐annual patterns of tree growth across time, space and species in a montane watershed.” New Phytologist 215, no. 4 (2017): 1387-1398. (Article link)

Accessories: Quick deploy tripod kit

PHYTOS 31, ATMOS 14, ATMOS 22, ATMOS 41 Gen 2, ATMOS 41W

Cable repair and replacement accessories

TEROS 10, TEROS 11, TEROS 12, TEROS 22, TEROS 21, TEROS 31, TEROS 32, TEROS 06, TEROS 54, PHYTOS 31

ZSC Bluetooth sensor interface and stereo to pigtail adapter

TEROS 10, TEROS 11, TEROS 12, TEROS 22, TEROS 54, TEROS 31, TEROS 32, PHYTOS 31, ATMOS 14, ATMOS 22

ATMOS relative humidity (RH) and barometer daughterboard replacement kit

ATMOS 41 Gen 2, ATMOS 14, ATMOS 41W

View All Accessories

ATMOS Features

wdt_ID	wdt_created_by	wdt_created_at	wdt_last_edited_by	wdt_last_edited_at	Features	ATMOS 41W	ATMOS 41 Gen 2	ATMOS 22	ATMOS 14
1	eric.lozaga	20/02/2024 01:14 PM	eric.lozaga	12/12/2024 01:15 PM	Air Temperature	✓	✓		✓
2	eric.lozaga	20/02/2024 01:14 PM	eric.lozaga	12/12/2024 01:15 PM	Relative Humidity	✓	✓		✓
3	eric.lozaga	20/02/2024 01:14 PM	eric.lozaga	12/12/2024 01:15 PM	Barometric Pressure	✓	✓		✓
5	eric.lozaga	20/02/2024 01:15 PM	eric.lozaga	12/12/2024 01:17 PM	Vapor Pressure	✓	✓		✓
6	eric.lozaga	20/02/2024 01:15 PM	eric.lozaga	12/12/2024 01:18 PM	Wind Speed	✓	✓	✓
7	eric.lozaga	20/02/2024 01:15 PM	eric.lozaga	12/12/2024 01:18 PM	Wind Direction	✓	✓	✓
8	eric.lozaga	20/02/2024 01:15 PM	eric.lozaga	12/12/2024 01:18 PM	Wind Gust	Up to 30 m/s	Up to 60 m/s	Up to 30 m/s
9	eric.lozaga	20/02/2024 01:15 PM	eric.lozaga	12/12/2024 01:18 PM	Solar Radiation	✓	✓
10	eric.lozaga	20/02/2024 01:15 PM	eric.lozaga	12/12/2024 01:18 PM	Precipitation	✓	✓
11	eric.lozaga	20/02/2024 01:16 PM	eric.lozaga	12/12/2024 01:19 PM	Precipitation EC	✓	✓
12	eric.lozaga	20/02/2024 01:16 PM	eric.lozaga	12/12/2024 01:19 PM	Lightning Strike Count		✓
13	eric.lozaga	20/02/2024 01:16 PM	eric.lozaga	12/12/2024 01:19 PM	Lightning Strike Distance		✓
14	eric.lozaga	20/02/2024 01:16 PM	eric.lozaga	12/12/2024 01:19 PM	No Moving Parts	Only Tipping Cup	Only Tipping Cup	✓	✓
15	eric.lozaga	20/02/2024 01:17 PM	eric.lozaga	12/12/2024 01:19 PM	Plug-and-Play Installation	No Plug, Just Play	✓	✓	✓
16	eric.lozaga	20/02/2024 01:17 PM	eric.lozaga	12/12/2024 01:19 PM	All Data via 1 Cable	No Cables	✓	✓	✓
17	eric.lozaga	20/02/2024 01:17 PM	eric.lozaga	12/12/2024 01:20 PM	Compatible with ZL6 Loggers	N/A	✓	✓	✓
18	eric.lozaga	20/02/2024 01:17 PM	eric.lozaga	12/12/2024 01:20 PM	Compatible with Some 3rd Party Loggers	N/A	✓	✓	✓
19	eric.lozaga	20/02/2024 01:18 PM	eric.lozaga	02/04/2025 04:01 PM	Powered via Onboard Solar Panels	✓ *
20	eric.lozaga	20/02/2024 01:18 PM	ariel.dearth	23/02/2024 01:43 PM	Data Sent to ZENTRA Cloud	Standalone - Direct to ZENTRA	Via Data Logger	Via Data Logger	Via Data Logger
21	eric.lozaga	20/02/2024 01:18 PM	eric.lozaga	12/12/2024 01:20 PM	Accurate at Low Wind Speeds	✓	✓	✓	N/A
22	eric.lozaga	20/02/2024 01:19 PM	eric.lozaga	12/12/2024 01:20 PM	On-board Leveling	✓	✓
23	eric.lozaga	21/02/2024 10:33 AM	ariel.dearth	21/02/2024 10:44 AM	LEARN MORE	ATMOS 41W	ATMOS 41	ATMOS 22	ATMOS 14
24	eric.lozaga	12/12/2024 01:21 PM	eric.lozaga	02/04/2025 04:01 PM	*Powered by onboard AA rechargeable batteries

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ATMOS 14

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ATMOS 14

Temperature and Humidity Sensor and More

Overview / Features

Microclimate monitoring made simple

With the ATMOS 14, all your bases are covered

A temperature and humidity sensor you can plug in, and walk away

Rapid readings

Compact, weatherproof, and low maintenance

Measure more. Work less.

Feature summary

Specifications

TECHNICAL SPECIFICATIONS

Measurement Specifications

Communication Specifications

Physical Specifications

Electrical and Timing Characteristics

Other

Support / FAQ

ATMOS 14 FAQs

Resources / Publications

Resources

Educational links

Support links

Case studies

Selected Publications

2020

2019

2017

Accessories

Quick deploy tripod kit

Cable repair and replacement accessories

ZSC Bluetooth sensor interface and stereo to pigtail adapter

ATMOS relative humidity (RH) and barometer daughterboard replacement kit

ATMOS Features

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