Some of the links on this forum allow SMF, at no cost to you, to earn a small commission when you click through and make a purchase. Let me know if you have any questions about this.
Is t Is the only different how far you can monitor the internal temperature? Do both have two probes? My smoker is only 20 ft from where I would monitor the temp, Don't know which one to order.
the 73 is the first version, the 732 is an updated version. 73 has no antennas and the on/off switches are prone to break. The
on/off switch for the transmitter on the 73 is inside the unit so you have to take it apart every time to turn it on and off. The 73 also does not transmit anywhere near the 100' it claims to. Somewhere there is an instructional to mod the 73 with antenna's but it really didn't help mine much.
The 732 has the on/off buttons right on the front for easy access. They also put antenna's on this unit that WORK, up to 300'. The units are waterproofed better than the 73's as well.
Do yourself a favor and just go with the new and improved 732...
An important feature the 732 has that the 73 does not is it will beep peridically to warn you the receiver is out of range. I had several times with my 73 where the signal was lost and by the time I noticed it, the smoker was too high/low in temp for an extended period. When the batteries get low, the range drops and the 732 keeps you informed of the connection.
I also have the 73. It is working fine for me. The removing back to turn on is a hassle, but I can live with it. I do waterproof it in the rain with a zip lock baggie. If I was getting another one I would up grade to the new one.
I have the ET-7 dual probe wireless. It flashed if it loses the signal. It works pretty well. Mine seems to work well up to 50' and through several walls of the house. Keep in mind other wireless things such as a wireless secirity camera may interfere with the signal from time to time if the channel is close to the one the probe locks onto. Garage doo openers may also interfere. Its not that big of an issue. They work pretty good for the money paid.