Robertshaw ETC-211100-000 Electronic Temperature Controller

The Robertshaw ETC-211100-000 Electronic Temperature Controller is a rugged, heavy-duty solution designed for commercial refrigeration and multi‑compressor systems. Operating from -30 to 220 deg F, it provides precise control with a SPDT relay wired to 120/208/240 VAC. Housed in a durable plastic NEMA 1 enclosure and UL/CSA approved, this controller stands up to demanding environments. It supports 2‑stage heating, automatic changeover, condenser fan cycling, and space and return air temperature control, making it a versatile choice for commercial cold rooms, display cases, and heat recovery setups. The device features a 0–10 V control output and an adjustable differential from 1 to 16°C, allowing fine-tuned responses to temperature shifts. A compact sensor (0.25 in diameter x 1.94 in length) with an 8 ft cable simplifies installation in tight equipment spaces, while reliable relay ratings support various load conditions.

• Heavy-duty design for commercial refrigeration and multi‑compressor control
• Temperature range -30 to 220°F (-34 to 104°C)
• SPDT relay with 120/208/240 VAC operation
• 0–10 V output for precise damper/valve control
• Adjustable differential 1–16°C
• Sensor 0.25" dia x 1.94" L; 8 ft cable
• Enclosure plastic, NEMA 1; UL/CSA approved
• Applications include 2-stage heating, ventilation control, automatic changeover, condenser fan cycling, space/return air temperature control, and water-cooled condensers