Chromalox replacement temperature controller is pcn 314720 6040-S00000, 1/16 din, soft start, universal input, output 1 Solid State Relay (0/10 VDC,500ohms minimum load), 100-240 VAC Power Supply. Compare to P1160, UDC1202-2, UDC1000, and P6101Z2 temperature controllers.

Chromalox 6040 Controller Operating Manual

Chromalox 6040 Catalog Page