DTU 702 FIELD CONNECTIVITY
It connects the gauges you already own to GaugeLink.
The DTU 702 is the small field gateway that plugs into a compatible tank gauge — over RS-232, RS-485, or Ethernet — and reports to GaugeLink over whatever the site has: wired network, Wi-Fi, or cellular. It comes with your subscription as rented equipment, so there is no hardware to buy.
EQUIPMENT INTERFACES
UPSTREAM OPTIONS
DEVICE AND TRANSPORT DETAILS
Last reviewed July 28, 2026
HOW IT FITS
Every site is different. The connection is designed around each one.
A remote yard with only cellular coverage and a depot with wired networking both work — we confirm the gauge, the interface, and the network path before anything ships.
FIELD
Gauge or controller
Compatible on-site tank equipment
CONNECT
DTU 702
RS-232, RS-485, or Ethernet
TRANSPORT
Encrypted VPN transport
Authenticated WireGuard over wired, wireless, or cellular/mobile data
OPERATE
GaugeLink and authorized users
Gateway traffic reaches GaugeLink servers; browser and API access use HTTPS
TWO WAYS TO CONNECT A SITE
With the gateway — or straight through your firewall.
DTU 702 gateway
The gateway ships to the site, plugs into the gauge, and reports home through an encrypted private tunnel.
Included with your subscription — rented, never a capital purchase
Works where the site has no fixed address or IT support
Traffic travels an encrypted, authenticated tunnel
A failed unit is repaired or replaced under the subscription
Direct connection
If your gauge is already reachable on the site network and your IT team is willing to open or forward a port on the router or firewall, GaugeLink polls it directly.
Nothing to install at the site
Your IT team stays in control of its own network edge
We help restrict the opening — for example, to GaugeLink's addresses only
Switch to a gateway later without losing any history
FIT ASSESSMENT
What we check before recommending anything.
Ten minutes of information about each site tells us whether the connection will work — before you commit to hardware.
Gauge manufacturer, exact model, and firmware/version
Available RS-232, RS-485, or Ethernet interface
Power and physical installation conditions
Wired, wireless, or cellular/mobile-data availability
Whether your IT team would rather open a firewall port than host a gateway
Number of tanks and sensors
Site access, network, and security-review requirements
Full specifications come with qualification
Detailed electrical, radio, environmental, and installation specifications are shared during qualification and deployment — not published here. For accuracy: the gateway is FCC certified, and the UL Listing applies to its power supply, not to the whole gateway or your installation.
START A CONVERSATION
Start with the equipment already at your sites.
Send us the gauge model, the connection it offers, the network the site has, and how many tanks — we will tell you if it fits.