EXPLOSION-PROOF Thermocouple

Explosion-proof Sensor Assembly–Thermocouple, Quick Release
Spring Loaded Fitting

• Tip sensitive, spring-loaded temperature sensor assembly
• Used in electric motors and generators for continuous sensing of the temperature of the bearings
• Approved for use in explosion-proof and flameproof applications
• U.S. or European threads available

Features

• Sheath Styles:
  » Stainless Steel with Copper or Aluminum Tip
• Junction Types, Single and Dual:
  » J, K, T, E
  » Grounded or Ungrounded
• Sheath Diameters:
  » .188”, .215”, .236” (6.0 mm), .250”

Applications

• Motors
• Generators

Performance Specifications

Temperature Range (Process):
-50°C to 260°C

Material:
Probe: 304 or 316 Stainless Steel with Fast Response
Copper or Aluminum Tip
Extension Fittings: 303 Stainless Steel
Connection Head: Epoxy Coated Aluminum or Stainless
Steel
Terminal Block: 94V-0 Rated Fiberglass

Pressure Rating:
50 psi (3.4 bar)

Insulation Resistance – Underground Model Only:
1,000 megohms minimum between element and case at
500 VDC
Dual Junction: 100 megohms minimum between elements
at 500 VDC

Time Constant (typical 3 ft/sec in moving water):
3 seconds

Explosion-proof and Flameproof Ratings:
National and Canadian Electrical Code:
Class I, Division 1, Groups B, C, and D
Class II/III, Division 1, Groups E, F, and G
T5 (Ta=80°C), T6 (Ta=65°C)
National Electrical Code (Article 505):
Class I, Zone 1, AEx d IIC
T5 (Ta=80°C), T6 (Ta=65°C)
Canadian Electrical Code (IEC 60079):
Class I, Zone 1, Ex d IIC
T5 (Ta=80°C), T6 (Ta=65°C)
ATEX: II 2 G Ex d IIC T5 (Ta= -50°C to 80°C),
T6 (Ta= -50°C to 65°C) Gb