4~20mA Meter Relay Lutron CT-2012
Lutron CT-2012 4~20mA Meter with 2 Alarms function commonly use to represent various parameters (example: Temp, Pressure, WATT & etc).
PH Controller Lutron PPH-2108
Lutron PPH-2108 is a PH & Temp. Controller with 3 Alarms settings. PH & Temp Probe is an option selection.