Used mjs

Trusted Seller
Johnson Controls M300MJ Monitor Module [New]
- Manufacturer: Johnson
. . . . . The M300MJ Monitor Module is intended for use in intelligent, two-wire systems where the individual address of each module is selected using the built in rotary switches. It provides either a 2-wire or ...
$176 USD
Tempe, AZ
Trusted Seller
Johnson Controls M301MJ Monitor Module [New]
- Manufacturer: Johnson
. . . . . The M301MJ monitor module can be installed in a single gang junction box directly behind the monitored unit. Its small size and light weight allow it to be installed without rigid mounting. The M301MJ i...
$116 USD
Tempe, AZ
Merren Johnson 431 Gang Rip --- Call for pricing
- Manufacturer: Johnson
Mj 431 in good condition. Can be seen under power.
Waterloo, IA