The Ashcroft T4 Temperature Switch is a precise and reliable industrial device designed for temperature monitoring, control, and safety shutdown applications. Its technical specifications are as follows:

• Temperature Range: -40°F to 750°F (approximately -40°C to 400°C)
• Accuracy (Setpoint Repeatability): ±1% of span
• Switch Output: SPDT or dual SPDT (DPDT equivalent)
• Setpoint Type: Single setpoint, field or factory adjustable
• Setpoint Adjustment Range: 0 to 100% of full scale
• Deadband: Fixed or limited adjustable
• Switch Mechanism: Precision snap-acting micro switch
• Enclosure Rating: NEMA 4X / IP66 (weatherproof and corrosion-resistant)
• Enclosure Material: Epoxy-coated aluminum
• Process Connection:
  • Direct mount: ½” NPT male
  • Remote mount: ½” NPT fitting (optional)
• Electrical Connection: ¾” NPT female (other options available)
• Stem Length (Direct Mount): 2.75″ to 24″
• Capillary Length (Remote Mount): 5 to 25 ft (longer lengths optional)
• Wetted Materials:
  • Stem: 316 stainless steel
  • Capillary: 316 stainless steel with 302 stainless steel armor
• Features:
  • Setpoint locking screw
  • Suitable for both direct and remote mounting
  • High reliability for critical applications (SIL 3 capable)
• Approvals & Certifications: UL, CSA, CE, RoHS

This temperature switch is widely used in industries such as oil & gas, petrochemical, power generation, and HVAC systems due to its durability, accuracy, and robust environmental protection.