Web Enabled Ultrasonic Level Sensor and Modbus Controller

The LOE sensor is designed for remote level monitoring in industrial applications. It provides real-time data logging, email/SMS alerts, and remote access through explorer.apgsensors.com, making it ideal for tank level measurement.

The LOE sensor supports Modbus RS-485 and Ethernet TCP/IP connectivity, allowing seamless integration into industrial monitoring systems. It also offers a Power-over-Ethernet (PoE) option for simplified installation.

Yes, the LOE can manage and monitor up to 10 APG Modbus level sensors, providing a centralized solution for multi-tank or multi-location monitoring.

The LOE sensor is available with 2” NPT or 3” NPT mounting, making it compatible with various tank and vessel installations.

• LOE-2126-0000: 1–25 ft.
• LOE-3136-0000: 1.5–40 ft.

Port 6700 must be open on your local network for the LOE/RST to connect and see the data on levelandflow.com. Firewalls sometimes close Port 6700, so adjust your network settings and firewalls. 

To toggle the DHCP on and off (static): 

Step 1: Plug the sensor in, and let it run until it calls into the website. 

Step 2: Hold the Reset button down for 20-30 seconds. 

Step 3: Watch the 2 green lights on the RJ-45 terminal. 

Step 4: After 20-30 seconds, both green lights will turn off for a second. Release the button. 

Step 5: The DHCP check box should be opposite of what it was. If it was on, it’s now off, and if it was off, it’s now on. 

Step 6: Unplug the sensor. Wait 10 seconds. 

Step 7: Hold down the Send/Reset button. 

Step 8: Plug the sensor in. 

Step 9: Wait for 20 seconds, then release. 

Step 10: All parameters are now reset back to factory setting. 

NOTE: if switched to the static IP of the sensor, you will need a crossover cable and a computer IP set to 169.254.0.* and sub mask of 255.255.255.0 to talk to the sensor. 

( * can be any number but 200)

To reset your parameters: 

Step 1: Hold down the Send/Reset button. 

Step 2: Plug the sensor in. 

Step 3: Wait for 10 seconds, then release. 

Step 4: All parameters reset except DHCP. If DHCP was on, it will still be on, and if the DCHP was off, it will still be off. 

Step 5: This includes the domain name. (Domain name is now:  www.levelandflow.com)

NOTE: Serial numbers greater than L000001990 no longer reset the domain name. 

First, set up yourself as a user on levelandflow.com. 

You’ll be asked for the web ID. The ID # is 73007490 

Be sure your RST/LOE is installed and communicating. You can open any browser on your local network and type in RST_XXXX or LOE_XXXX (last 4 digits of your RST/LOE). You will then see the sensor on the embedded web server. See the RST-5003/LOE user manual for more info. 

To set up your system on levelandflow, our Sales team needs the following: 

1. Your first and last name. How you spelled your name when you signed up as a User.
2. The name you want to call your site.
3. The serial number of your RST-5003/LOE web enabled module.

Our Sales team will then be able to set up a site for you and assign you as a user to it.