### What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

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.

View all Tags

# What can I do with the Sensor Factory sensors of PRTG?

#### 0

I would like to know what functions I can use with Sensor Factory sensors.

• What are Sensor Factory sensors for?
• How do I set them up?
• What can I configure there?

Created on Feb 5, 2010 12:23:21 PM by

Last change on Sep 13, 2019 7:24:36 AM by

11 Replies

# Using Sensor Factory sensors

Sensor Factory sensors are mainly used to compute and summarize data from multiple sensors. They display the information in a single graph or data table. PRTG can individually provide this information for any particular sensor channel as an aggregated value, as a computational line based on simple arithmetic, or as a value defined by one of the functions available for Sensor Factory sensors.

You can add a Sensor Factory sensor to a device the same way you add any other sensor. Sensor Factory sensors can, however, include information derived from sensors that belong to different devices and so summarize the respective data.

Additional functions allow you to calculate the following values for single sensors or multiple sensors:

• Minimum and maximum values
• Average values
• Percentage values

You can also insert horizontal lines based on fixed values for visualization.

# More

Created on Feb 12, 2010 2:59:10 PM by

Last change on Jun 2, 2022 8:19:20 AM by

#### 0

Well, the manual does describe this technically, but it doesn't provide much, if anything for examples, which would be helpful.

It seems to allow you to add the values from various sensors. For example I wanted to get the aggregate total of 3 sensor input and output.

What I used was:

1. 1:XO-in
Channel(2123,0)+Channel(2103,0)+Channel(2163,0)
2. 2:XO-out
Channel(2123,1)+Channel(2103,1)+Channel(2163,1)
3. 3
100000

These are collected at the remote routers where they all come in to the data center in a single connection. This connection is smaller than the sum of the allowed traffic of these three, so we need to know if we hit the ceiling which is 100meg.

Created on May 24, 2010 6:18:04 PM by bhanson (0)

Last change on May 26, 2010 2:39:54 PM by

#### 1

One of my favorite uses for Sensor Factory Sensors is for notifying me of network connectivity problems. While all Sensors do this, I use the Sensor Factory to eliminate false positives.

Here's what I do. I have 3 remote probes, all with the same sensors. These remote probes are located around the country running on different cloud providers.

So lets say I have a ping sensor on each probe pinging my Data Center's router's WAN side IP. The Sensor Factory "rolls these up" in one graph.

This is good, because although I may see a spike in latency from one probe, if I don't see it on all 3, I know it was an external issue. before this, it was unclear whether there the problem was on my end or not and required further investigation. (wasting my time)

Now for notifications, I shoot out text messages/email to our ops group if the sensor is down. (this requires all 3 remote probes to show down) Having this 'majority vote' has effectively eliminated false positives related to external network problems and has made anyone on our CriticalAlert list very pleased that if there is a Notification, we know it is real and serious.

Saves us from the 'boy who cried wold syndrome'

Just my 2 cents. but is working great for us.

-Ryan

Created on Dec 11, 2012 5:04:27 PM by Ryan Biddle (10) 1

#### 0

Ryan,

Can you tell me how you got the probes in each data-center to communicate to allow the sensor factory to access their channels?

Thanks, James

Created on Aug 29, 2014 10:53:25 AM by jamesy281 (0) 1

#### 0

Dear James

The probes all send their data to the server. The factory sensor runs on the core, even if it is put on a probe. That is why a factory sensor can access other probes.

Created on Sep 1, 2014 11:36:31 AM by

#### 0

Arne,

Thank you for your reply. I realize they all send their data to the core however if I had thee servers running in different cloud providers as in Ryan's example they would all need some form of connectivity between each other in order for the core/ sensor factory to access their channels.

In my scenario we have our kit hosted in one DC which is broken up into VLANS, we have a core server and probe servers monitoring sensors on each. what I wanted was one of the servers inside the DC to monitor for example the ISP public link and also one completely separate outside in say another DC monitoring it also. I would then aggregate these two sensors into a sensor factory sensor and only show down status if both links are down.

I just wasn't sure how to get PRTG to get data from the external probe in order to access the channel.

I hope that makes sense.

Thanks, James.

Created on Sep 2, 2014 9:02:31 AM by jamesy281 (0) 1

#### 0

Dear James

Are you still speaking of getting data from a probe, or getting data from a core server which is not connected to the server which runs the factory sensor? It is not possible to get data from a separate PRTG installation using the factory.

Created on Sep 2, 2014 11:26:32 AM by

#### 0

Arne,

I am talking about getting data from the probe. So I would have a core server inside our DC (core where the sensor factory would also run) which pings the ISP IP and a probe running on an external cloud provider doing the same. is there a proxy inside PRTG or some such thing that would let me connect to the probe from the server to access the channel data?

Thanks, James.

Created on Sep 2, 2014 3:52:53 PM by jamesy281 (0) 1

#### 0

Dear James

If the probe is connected to the PRTG core server, this implies that the core continuously get its data. Otherwise, you cannot get its data. The PRTG probe connection supports no proxy server. Any PRTG probe can connect to one core server only.

Created on Sep 3, 2014 11:34:34 AM by

#### 0

I notice in the Knowledge Base that the sample Factory Sensor has "N/A" for both Downtime and Uptime, as seen below. Is it not able to keep track of it's downtime and uptime?

Created on Dec 13, 2016 3:12:56 PM by Evan Lane (130) 2 1