Looking for a way to monitor humidity in a Class 1 Div 2 area using wireless, battery powered, and a laptop to log data. Any recommendations? I rather not use a PLC becuase they want to be able to move the transmitter around to different areas.
I don't know if has Class 1 Div 2 approvals yet, but here is an example of how to do that remotely with Banner Engineering's SureCross solution. Couple this with a Red Lion DataStation Plus and you have a complete datalogger system.
No it is does not have to be Line of Sight. It can penetrate walls pretty good. Pine trees seem to be it's Cryptonite. So is a mound of dirt.
Back at the Red Lion unit we have the Banner Engineering SureCross that talks Modbus485 directly to the Red Lion unit. If you really wanted to use a PC to do the logging, you use Banner's GatewayPRO model which is a node on ModbusTCP. Then have some software running in the PC that would talk to the GatewayPRO. This route may not be as easy to accomplish as the other idea.
Here are some other examples of the wireless being used in plants where it clearly is not Line of Sight.
In this video and about 2minutes into it we are temporarly mounting the RH node. It also reads Temp as well.
Looking for a way to monitor humidity in a Class 1 Div 2 area using wireless, battery powered, and a laptop to log data. Any recommendations? I rather not use a PLC becuase they want to be able to move the transmitter around to different areas.
Getting intrinsically safe or rated for Cl 1 Div 2 equipment may be difficult and expensive.
It may be easier and less expensive to have all monitor equipment outside of Cl 1 Div 2 area and run a tygon tube into the area to get your reading. If you are looking for a real short term spike transit time of the "spike" may be a problem. If conditions are fairly steady state transit time in teh tubing may not be a problem.
Depending on length you may need a pump with high dP to get your sample and then tee the discharge to tap into line for instrument. Many of the pumps used in industrial hygiene are rated for use in combustible atmospheres but they are not cheap either. Battery powered units will run for 4 to 5 hours reliably.
Dan, I like the Tygon tube idea. QC wants to monitor some of the rooms and dryers where we are making our product. The want to be able to move the transmitter around so anything fixed or bulky won't work.
Thanks,
Dave
Dan, I like the Tygon tube idea. QC wants to monitor some of the rooms and dryers where we are making our product. The want to be able to move the transmitter around so anything fixed or bulky won't work.
Thanks, Dave
Dave
Sounds like workroom air monitoring for employee protection.
Direct colorometric tubes may be an option for quick spot checks. Pump alone 3 t0 500 tubes 5 to 15 each, have limited storage life.
Right up my alley and expertise area ie industrial hygiene and electrical.