Best Pressure Switches
Pressure from main blower actuates switch to operate Duct Booster fan automatically.
Reviews
Find Best Price at Amazon"No real issues there, although I had to relocate it to get a better stream of air (the initial mounting location would not trigger the change, probably due to a lack of adequate pressure). So I deducted two stars since most people will need those detailed instructions, as they are not electricians or HVAC contractors."
"You cut the white wire and attach each end of the white wire to one of the posts on the switch."
"If you have any concern about low pressure differential to trip the switch in the duct work where you are installing this, pick a better location with a higher pressure differential- the switch is not reliably as sensitive as I had hoped it was."
"I want to add a booster fan for the kitchen exhaust as the fan from the microwave is not powerful and a pretty long distance to the outside wall with the 4" pipe."
"#2 black wire common from house direct to fan. #3 connect line to "open" on switch back to white wire on fan to make the loop. #4 connect earth to switch box and duct fan. Turns fan on immediately after furnace kicks on."
"Placement is important, I tried using it where the booster fan is ( has to be upstream from the Booster fan ) but the pressure change in the duct was too low so it didn't work."
"I placed the switch downwind of the 1st floor damper near where the branch duct with the booster fan takes off."
"I moved it 18' from the Tjernlund DBF2 Dryer Duct Booster Fan and was too sensitive."
The Square D Pumptrol™ by Schneider Electric Water Pressure Switches have been providing rugged, reliable performance for over 67 years. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"My only dislike is that there has been a change since the older models; this one has a lever that you have to use to hold the relay in the "On" position when starting from zero pressure- I don't recall having to do that with the old one ever."
"Pump protection: This is the second pump control that I have used with well pump protection."
"The only negative, is if the low pressure feature is triggered the lever to overide it moves smoothly but it doesn't lock the pump on."
"There are tons of tutorials on youtube on how to do this it's actually fairly easy and takes all of 15 minutes or so if you have the tools."
"However, it is markedly cheaper, lighter, and not as well built as past models."
"This works great and will protect your well pump should your well get low or pumped out of water."
"It also has a low pressure cut out which tripped at 18 PSI."
"Made the mistake of buying a Chinese knock-off on popular auction which after the time and frustration of installing it did not work."
Exhaust fans and draft hoods employ sensing switches to sense draft down from exhaust fan; switch signals condition upon fan failure or insufficient draft. Refrigeration and cooling coils are maintained by sensing differential pressure/airflow drop across coils; switch signals condition when they ice, or actuates the defrost cycle.
Reviews
Find Best Price at Amazon"It comes with an assortment of springs so that, with the integral micro adjustment, may be used over an uncommonly wide range of pressure requirements: to wit .010" W.C. to 10.0" W.C. A perfect switch to provide warning of blocked HVAC air filters, etc."
"I have it controlling two duct blowers in my HVAC system."
"I had a furnace air switch fail and the exact replacement part was about 50 bucks more expensive."
"Had to put in an intermediate accumulator for moisture collection that can be emptied every month or so."
"An extremely versatile switch for the price."
"Perfect replacement for a wide range of specialty air pressure switches: this will work well in vacuum as well as pressure applications, and can be tailored to a wide range of activation values."
"Everything works great highly recommended company to cook more for sale on Amazon."
"ti was the right range that I required, so it did the job."
Best Pressure Transmitters
The infrared sensing terminals can be mounted up to 300 feet apart and will send a signal back to the DCR-2500 receiver up to half mile away* anytime someone passes between the sensors. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"Makes no sense to me, you'd think with a broken beam kind of system, it would reliably trip every time a human sized thing walks past it, and it really blows my mind that at times it decides to not trip when a big ole car drives past it? I'd say it works reliably probably about 97% to 98% of the time, and the good thing about this, over the PIR sensors I've tried is it NEVER gives false alarms, so it is a great improvement over any PIR sensors I've tried... but I'm rating it only 3 stars because I'd expect this to work better since it's a broken beam system..."
"I have had the BBT-2500 sensors for a year now and this is what I have experienced: first, they are hard to "pair" until you realize that just because the power buttons light-up that doesn't mean the devices are turned on. I have an automatic gate nearby that has 12 volt power so I just ran wires to the transmitter and receiver to keep them charged through the dark winter months."
"Works well so far and I have had this for over 1 month."
"I have these installed across my driveway covering about 25 feet of frontage and along side a fairly busy road, maybe 4 feet off the shoulder."
"I have had to replace these 3 times now, The problem is not in the product but in the location of installation."
"Installed across our driveway and spaced about 40ft apart, and at a distance of about 100 yd to the receiver located just inside a window at the front of our house."
"Tried leaving them in the sun to charge assuming the batteries are dead, that did not help. There is nothing anywhere on the internet, or their web site accept very the very unhelpful, incomplete users guide."
"Put them up in July and in December they are no longer working."
Best Pressure & Vacuum Gauges
Infrared thermometer for noncontact surface temperature measurement for use in monitoring electrical, mechanical, HVAC, and automotive systems. Measures temperature from -30 to 650 degrees C (-22 to 1202 degrees F) with an accuracy of + or - 1 degree C or + or -1.0% of the reading from 0 to 650 degrees C. Dual lasers rotate to pinpoint the edges of the measurement area.
Reviews
Find Best Price at Amazon"I use this device to determine the temperature of my cast iron pans when I use them for searing meats."
"Great little tool to check temps of various things."
"Works perfect."
"This is the real deal ."
"We use them to spot potential bat hibernaculums in the winter for protection."
"Good laser thermometer."
"This is a nice thermometer."
"Excellent tool for checking air vent temperatures for air conditioning work."