Electronic Temperature Controls

System 350™

System 350 temperature family includes on/off (SPDT), proportional (0 to 10 VDC and 0 to 20 mA output), and reset (SPST) controls in addition to stage, display, and power modules. The controls are used for a wide variety of applications, in conjunction with the A99B Series Temperature Sensors and TE-6001 Series Sensor Mounting Accessories.


A421 Series

A421 Series electronic temperature controls are single-stage controls with a single-pole, double-throw (SPDT) output relay. Use with single-stage refrigeration or HVAC equipment. A421 controls feature a backlit LCD with adjustable brightness and a three-button touchpad interface that can be set to restrict adjustments. Standard modules have simple on/off settings for heating or cooling, an adjustable anti-short cycle delay, temperature setback, and sensor offset capability. Models are also available with integral power cord, off-cycle defrost, or integral cycle timer.


A525 Series

A525 Series electronic refrigeration controllers with adaptive defrost offer multiple functions in a smart controller, delivering efficiency, easy installation and use, application flexibility, and network integration. Control all aspects of refrigerated spaces, with five control relays for variable speed fans, compressor, defrost and alarms; two-speed fan control to optimize air flow; unique adaptive defrost algorithms to save energy; and numerous customization options.


MR Series

MR Series controls are versatile, microprocessor-based, multifunction, programmable temperature controls. All MR Series controls manage temperature and alarm. Some models can also manage defrost cycle (active or passive defrost), and evaporator fan functions. These compact controls feature large, red LEDs and are available as panel mount or DIN rail mount. A99B temperature sensors enable remote mounting of the display unit.


MS Series

MS Series temperature controls are versatile, microprocessor-based, multifunction, programmable temperature controls, for single and multiple-stage applications. Operating modes include direct, reverse, deadband or individual setpoint. Large, easy-to-read displays use red LEDs. Choose panel mount or DIN rail mount models. A99B temperature sensors enable remote mounting of the display unit.


A99B Series

A99B Series temperature sensors are passive positive temperature coefficient (PTC) sensors. Accessories support a variety of mounting configurations. Applications include temperature sensing for freezers and coolers, as well as defrost termination sensing, space and return air temperature sensing, and condenser fan cycling.


To learn more about our diverse offering of electronic controls, ask your friendly, experienced PENN team.