Watlow Specialty RTDs

• Two- or three-wire
• Resistance: 100Ω at 0°C
• Alpha curve: 0.00385Ω/Ω/°C
• Tolerance at 0°C: ±0.12% (±0.25°C)
• Range: -50 to 260°C (-58 to 500°F)

The Watlow specialty RTDs are available in six styles: 6 inch adjustable spring style, 12 inch
adjustable spring style, adjustable armor style, cartridge with flange, open air, open air with
flange and surface mount. These Watlow RTDs are also available in multiple diameters and lengths.

Watlow RTDs

Watlow’s platinum resistance elements are specially designed to ensure precise and repeatable
temperature versus resistance characteristics. Watlow RTDs are made with controlled purity platinum,
have high purity ceramic components, and are constructed in a unique strain-free manner.

Performance Capabilities

Ceramic elements are extremely precise and stable within the wide temperature range of -50 to 260°C
(-58 to 500°F).

Patented, strain-free construction

• Provides dependable, accurate readings
• Allows elements from different lots to be substituted without recalibration

High signal-to-noise output

• Increases accuracy of data transmission
• Permits greater distances between sensor and measuring equipment

Temperature coefficient (alpha) carefully controlled while insulation resistance values exceed
DIN-IEC-751 standards

• Ensures sensor sensitivity
• Minimizes self-heating
• Allows precise measurement
• Repeatable

Highly controlled manufacturing process

• Ensures wide temperature range
• Stabilizes physical and chemical attributes

Applications for the Watlow RTD with Standard Industrials Insulated Leads

• Air conditioning and refrigeration servicing
• Furnace servicing
• Stoves and grills
• Textile production
• Plastics processing
• Petrochemical processing
• Micro electronics
• Air, gas and liquid temperature measurement
• Exhaust gas temperature measurement