ZL6 Pro Data Logger


ZL6 Pro Data Logger

New premium data logger

If time is a luxury you don’t have, and labor is at a premium, you’ll love the new world-class ZL6 Pro—a powerful, all-inclusive solution that’s effortless to set up, automatically cloud-connected, hassle-free, ultra-robust, and comes with tons of extras.

Everything included, and more

The ZL6 Pro data logger is an all-in-one package for people who want state-of-the-art, cloud-based data delivery without spending much time and effort on it. It puts data collection and management on auto-pilot, so you can focus on what you love. How? We’ve added things like automated 15-minute real-time data uploads, automatic cloud backup, free install kit, 3 years of free yearly tune-ups, an increased 3-year warranty, and free ZENTRA Cloud for up to 4 years. Plus, the Zl6 Pro data logger is simple to install, uber-robust, and comes with Bluetooth® configuration, GPS, firmware-over-the-air updates, and integrated metadata, all which automate, simplify, and speed up the process of data collection, management, and sharing.

Automate your life

The ZL6 Pro data logger uses ZENTRA Cloud to automatically deliver near-real-time data wherever and whenever you need it, every 15 minutes (more often than the ZL6). Accessing data on ZENTRA Cloud speeds up your analysis by enabling you to correlate event factors, see important trends, or discover problems almost instantly, from the comfort of your own desk. This means your grad students can spend less time downloading data in the field, and more time generating research papers. 

Plus, data are incredibly easy to distribute and share. Simply enter an email, and send an invitation. Your collaborators can instantly see what you see. The ZL6 Pro and ZENTRA Cloud allow you and others to review data the way you want, whether it’s in map format, short graphs, a list, or downloading to data-analysis packages. Not only that, the ZL6 Pro package comes with a free 3+ year subscription, so you don’t have to worry about renewals. And cloud data backup is now automatic so you don’t ever have to think about it.

Do almost nothing. See everything.

The ZL6 Pro connects up to six different types of multi-parameter METER sensors, so you can potentially monitor a host of different parameters, such as weather, soil moisture, and soil water potential, all at the same time, giving you deeper insight into what’s going on at your site. We’ve also integrated barometric pressure to eliminate the need to install extra sensors. And because everything is plug and play, you don’t have to be an expert at wiring or programming. 

Plus, the ZL6 data logger requires little setup. It self-recognizes what’s plugged into each port (as long as they’re METER digital sensors), and the new ZENTRA Utility app uses Bluetooth to configure and troubleshoot the ZL6, so you can bring a smartphone or tablet to the field instead of a heavy laptop. You can even configure the logger from your office using ZENTRA Cloud. We also added GPS, so it automatically keeps track of where data are collected. And ZENTRA Cloud’s map feature will take you right back to where you installed it. New firmware-over-the-air capability means ZENTRA Cloud updates ZL6 firmware automatically, with no effort from you.

Peerless design—world-class reliability

We engineered the ZL6 data logger to be extremely robust and low maintenance, so you can almost forget about your data logger completely. The ZL6’s integrated solar charging panel means there’s hardly any power maintenance required. An IP56-rated enclosure designed for shedding rain makes sure water doesn’t get in. More secure cable handling ensures sensor cables don’t get yanked out. A hidden antenna limits breakage. And we’ve added fully round clasps and hinges that won’t break. Plus, free yearly tune-ups for 3 years and an increased 3-year warranty mean you no longer have to worry about upkeep.

Get connected

With the ZL6 Pro, almost everything about data collection and management is automated, so you and your team can focus on data. Not distractions. Together, the ZL6 Pro and ZENTRA Cloud make it easy to connect all the critical tools you need to understand the soil-plant-atmosphere continuum, so you can analyze your data faster, and at a much deeper level. Get near-instant data anytime, anywhere, in any form that you need it, so you’ll never miss another important data insight.

Request a quote Contact us Compare all 3 ZL6 loggers


  • Ultra-rugged and durable construction
  • Configure via Bluetooth with the ZENTRA Utility app for iOS and Android
  • Plug and play with METER sensors
  • Six sensor ports
  • Automated 15-minute real-time data uploads (user-activated during setup or remotely)
  • Automatic cloud data backup
  • Free install kit (USB cable, 6 rechargeable batteries, QS Manual, zip ties, spare strain relief, spare door seal)
  • 3 years of free yearly tune-ups
  • Free ZENTRA Cloud for 3+ years. Enables near real-time data viewing anywhere with an internet connection (data can also be downloaded via USB)
  • Increased 3-year warranty
  • Integrated GPS and barometric pressure measurement
  • Simple setup
  • Firmware-over-the-air updates
  • Built-in solar panel for extended deployments
  • Rechargeable nickel-metal hydride (NiMH) batteries
  • Stores 40,000 to 80,000+ records, depending on sensor configuration
  • Best for viewing data on the go
  • See signal strength and connection quality in real time: test connectivity at your site BEFORE installation
  • Transmitted data is backed up in the data logger memory to give you extra data protection
  • See a comparison of all 3 ZL6 loggers—>


View GSA details


Sensor logging interval

ZL6 Basic: 60 min (average or accumulation of 60, 1-min sensor readings)
ZL6 and ZL6 Pro: 5 min to 12 h (average or accumulation of 1-min sensor reading)

Logger reporting interval

ZL6 Basic: None
ZL6: Hourly with additional charges for more frequent reporting
ZL6 Pro: Hourly with the ability to enable more frequent reporting


ZL6 Basic: Synchronize with ZENTRA Utility or ZENTRA Utility Mobile
ZL6 and ZL6 Pro: Synchronize automatically and on-demand; GPS, cellular, or ZENTRA Utility software


Computer communication

Standard USB cable, USB A to micro-USB B

Internet downloads

SSL/TLS encrypted

Cellular communication (ZL6 and ZL6 Pro)

Specifications: UMTS 3G 5-band cellular module with 2G fallback
Coverage: AT&T® and T-Mobile® in USA, 550+ global partner carriers. Cellular and data hosting service provided by METER

Specifications: 4G LTE-M and NB-IoT cellular
Coverage: AT&T® and Sprint® or Verizon® in USA. Cellular and data hosting service provided by METER

See note on 4G LTE availability

Mobile communication

Bluetooth 5.2 supporting Bluetooth Low Energy protocol

GPS communication (ZL6 and ZL6 Pro)

Type: Integrated 56-channel GPS/QZSS receiver
Update: Daily (automatic) and on-demand (manual)
Accuracy: ±3 m, with good sky view



Length: 14.9 cm (5.9 in)
Width: 6.3 cm (2.5 in)
Height: 25.0 cm (9.9 in)

Enclosure material

Weather-, impact-, and UV-resistant polymer

Enclosure rating


Enclosure access

Hinged door with latches and eyelets for lock or zip tie

Sensor input ports

6 (supports METER analog, digital, or pulse sensors)

Sensor port type

3.5-mm stereo plug connector

Memory type

Nonvolatile flash, full data retention with loss of power

Data storage

ZL6 Basic: 2 MB (20,000 to 30,000 records depending on configuration)
ZL6 and ZL6 Pro: 8 MB (40,000 to 80,000+ records depending on configuration)

Battery capacity

ZL6 Basic: 6 AA alkaline batteries
ZL6 and ZL6 Pro: 6 AA NiMH or alkaline batteries

Battery life

Alkaline: 3–12 months depending on configuration
NiMH: 3+ years with unobstructed view of sun. Charging through solar energy harvesting or USB

Operating temperature range

Minimum: –40 °C
Maximum: +60 °C


Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)

California requires the following notice:

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov



Have a question? Our team is ready to help!

We manufacture, test, calibrate, and repair every instrument in-house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.

Email: sales.environment@metergroup.com

Phone US: +1 509-332-5600
Phone Europe: +49 89 12 66 52 0

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