Watlow RTDs and Thermistors Data sheet
W A T L O W
99
RTDs and Thermistors
RTDs and
Thermistors
Resistance
Temperature Sensing
RTDs
Watlow’s platinum resistance
elements are specially designed to
ensure precise and repeatable
temperature versus resistance
characteristics. The sensors are
made with controlled purity platinum,
have high purity ceramic components
and constructed in a unique strainfree manner.
Performance Capabilities
• Ceramic elements are extremely
precise and stable within the wide
temperature range of -200 to 650°C
(-328 to1200°F).
Features and Benefits
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
Metric diameters and fittings are
available, please consult factory
Applications
• 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
RTDs and
Thermistors
Speciality RTDs
and Thermistors
Construction Styles
10 = 6 in. Adjustable Spring Style
11 = 12 in. Adjustable Spring Style
12 = Adjustable Armor Style
50 = Open Air
80 = Surface Mount55 = Open Air with Flange
25 = Cartridge with Flange
0.265 in.
(6.7 mm)
O.D.
L
E
0.
3125 in.
(7.9 mm)
0.625 in.
(15.9 mm)
Stainless
Steel Sheath
and Flange
Flange
0.648 in.
(16.5 mm)
0.324 in.
(8.2 mm)
0.187 in.
(4.7 mm)
0.373 in.
(9.5 mm)
0.156 in.
(4 mm) Dia.
(3) Holes
L
E
0.625 in.
(15.9 mm)
Stainless
Steel Sheath
and Flange
0.187 in.
(4.7 mm)
L
E
Flange
0.648 in.
(16.5 mm)
0.324 in.
(8.2 mm)
0.373 in.
(9.5 mm)
0.156 in.
(4 mm) Dia.
(3) Holes
4.7 mm
(0.187 in.)
0.875 in.
(22.2 mm)
0.101 in.
(2.6 mm) Dia.
(4) Holes
1.375 in.
(34.9 mm)
0.250 in.
(6.3 mm)
0.343 in.
(8.7 mm)
E
Aluminum
Body
0.531 in.
(13.5 mm)
0.250 in.
(6.3 mm)
See next page for
Rapid Ship sensors and
ordering instructions.
W A T L O W
107
RTDs and Thermistors
0.3125 in.
(7.9 mm)
L
(Spring O.D. = 0.250 in. (6.4 mm)
E
Spring
Length
L
0.187 in.
(4.7 mm)
E
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