Robertshaw O12-4834 Refrigeration Pressure Controller

Robertshaw O12-4834 Refrigeration Pressure Controller is built for precise dual-pressure control in refrigeration systems. This adjustable differential and range unit delivers reliable cycling across a broad operating envelope, helping maintain optimal temperatures and compressor efficiency.

Operating range includes 10 inch mercury vacuum to 100 psi (Open Low) and 150 to 450 psi (Open High), with differential ratings of 10–40 psi (Open Low) and 70 psi (Open High). The SPST contact configuration supports straightforward wiring, while the 1/4 inch SAE flare nut connections ensure secure, leak-free fittings. A capillary length of 48 inches provides flexible installation options and easy routing in tight equipment spaces. The reset is auto/convertible for simple commissioning and dependable startup.

• Dual pressure control for refrigeration applications, maintaining accurate setpoints on both low and high sides
• Adjustable differential and range for precise cycling across the operating envelope
• Wide operating range: 10 inHg vacuum to 100 psi Open Low; 150–450 psi Open High
• SPST contact configuration simplifies wiring and integration
• 1/4" SAE flare nut connections for secure, leak‑free fittings
• 48" capillary length provides flexible routing in complex systems
• Auto/Convertible reset for easy commissioning and reliable startup