The Ashcroft C-600A-04 Duratemp is a remote-mounted gas-actuated thermometer engineered for applications requiring maximum durability and resistance to shock and vibration. Its movementless design contains no gears to wear or misalign, eliminating mechanical failure points and significantly increasing instrument life.

The thermometer provides ±1% full-span accuracy in compliance with ASME B40.3 standards. Unlike conventional systems, the gas-actuated mechanism introduces no head or elevation error due to bulb position, ensuring accurate temperature transmission regardless of mounting orientation. The large Maxivision® dial places the pointer on the same plane as the graduations, completely eliminating parallax for reliable reading from any angle.

The C-600A-04 features a durable phenolic case with snap ring design, allowing easy glass replacement without special tools. Available in 4.5-inch and 6-inch case sizes, it accommodates a wide selection of temperature ranges from -320°F to 1200°F with 125% overrange protection. The 316 stainless steel bulb measures 3 inches long by 3/8 inch O.D., connected via 5 to 80 feet of capillary tubing with optional armor choices including AISI 302 stainless steel spring armor, interlock stainless steel, or PVC-coated protection.

Multiple bulb styles are available: B03 standard bulb, B08 (not pressure-tight, thermowell recommended), and B01/B17/B18 bendable extension styles with adjustable union connections for insertion requiring more than 13 inches. The A1 armor option, constructed of AISI 302 stainless steel spring armor, was originally designed for U.S. Navy Hi-Shock Thermometers.

Typically installed with a thermowell, the Duratemp is ideal for high-vibration environments such as compressors, pumps, and engine skids, as well as extreme temperature applications. The remote mount capability allows operators to monitor process temperatures while maintaining safe distance from hazardous areas.

Applications

• Offshore oil rigs and refineries
• Chemical and petrochemical processing
• Water and wastewater treatment
• Pulp and paper mills
• Power generation plants
• Equipment skids and general industrial machinery
• HVAC systems
• Pharmaceutical and biotech manufacturing
• Food and beverage processing

Features

• ±1% full span accuracy (ASME B40.3 compliant)
• Movementless gas-actuated design - no wear, no gears
• No head or elevation error
• Maxivision® dial for parallax-free reading
• Phenolic case with snap ring for easy glass replacement
• 4.5" and 6" case size options
• Temperature ranges: -320°F to 1200°F
• 125% overrange protection
• Multiple mounting options: surface/lower, flush/rear
• Capillary lengths: 5 to 80 feet
• Multiple armor options including AISI 302 stainless steel spring armor
• Mercury-free construction with gas-operated molecular sieve
• ISO 9001 certified manufacturing