The AMETEK Jofra Instruments DK-3520 is a TEMPERATURE/DRY block calibrator 115V 50/60 HZ, supplied in rebuilt, surplus condition. It is a temperature or pressure calibrator from AMETEK Jofra Instruments, used to verify and calibrate temperature- or pressure-sensing instruments in the field or in a calibration lab.

Jofra Instruments is credited with developing the portable dry-block temperature calibrator, an instrument that heats or cools a metal block, rather than a liquid bath, to a stable, known temperature so a sensor under test can be checked against it. The product line spans portable field calibrators through laboratory-grade reference calibrators, covering a range of temperature spans and accuracy classes. AMETEK supports parts such as the DK-3520 as part of a broader catalog of industrial instrumentation and electromechanical components, sourced to match the original fit, form, and function of the unit being replaced.

Key Features and Specifications:

• Condition: Rebuilt, Surplus
• Manufactured by AMETEK Jofra Instruments
• Identified by AMETEK part number DK-3520

The DK-3520 is typically specified for calibration and metrology work, used to verify thermocouples, RTDs, or other temperature- and pressure-sensing instruments against a known reference, and is sourced as a replacement or upgrade unit matched to the calibration range required.