The TD-165 from Honeywell is a Tridicator with 3-1/8” dial, 1/4” NPT and 75 psi max. It's a Pressure/temperature gauge with relief set point indicator for boilers and shut off valve.

Features:

• Measurement: Fahrenheit/ Celsius/ PSI;
• Maximum Temperature: 320F;
• Maximum Safe Operating Pressure: 75 psi

Technical Specifications:

• Application: Pressure/temperature gauge with relief set point indicator;
• Connections: 1/4" NPT;
• Dimensions: Dial Size - 3 1/8" (79.4mm), Stem length - 2" (42.1mm);
• Maximum Safe Operating Pressure: 75 psi;
• Temperature Range: 60°F to 320°F (15°C to 160°C);
• Weight (lb): 0.3 lbs (0.14 kg);
• Comments: Pressure/temperature gauge with relief set point indicator.

Warranty:

• 2 years manufacturer's warranty from the date of purchase.