What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Toner level in percentage



I received successfully the toner level data from my Canon-printer with a SNMP custom sensor, but it won't display the returned data as percentage value in the diagram. In the field Message, the returned value is visible as number (without %). I have two canals "respond time" and "down time" (sorry if these two expressions aren't correct, I have my PRTG set up in german).

How can I display the returned value in percent in a graph?

I already checked this post, but I didn't get it... https://www.paessler.com/manuals/prtg/snmp_custom_string_sensor

I hope you can help me.

Kind regards, Eddie

custom-sensor percentage printer toner

Created on Oct 21, 2014 7:21:03 AM

2 Replies

Accepted Answer




Thank you for using PRTG! If you are indeed using the SNMP String Sensor graphing the value directly won't be possible. Please try using the "normal" SNMP Custom Sensor instead.

best regards

Created on Oct 22, 2014 6:41:55 AM by  Torsten Lindner [Paessler Support]



Thanks for your reply. The problem was, that I use the custom string sensor instead of the custom sensor...

Created on Oct 28, 2014 1:05:35 PM

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.