Catalogue Flexible Heaters Design Guide
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MINCO - 2089, 131428, 163793, 2254, 2228
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Custom Design Options
Integrating sensors and thermal cut-outs. Temperature sensors
Integrating sensors into heaters simplifies your assembly operations by providing a gradient-free system with excellent temperature control. The sensor sits in a window of the heating element. It reacts to temperature changes in the component beneath the heater, yet remains close to the heating element itself. This tight coupling of heater, sensor, and heat sink can greatly improve heating control and accuracy.
Types of sensors used in heater/sensors_
Sensors can be electrically connected via leadwires or flex circuitry.
Most heater/sensors are custom designed. Minco recom­mends prototyping with standard heaters and Thermal-Ribbon™ sensors. Get more information on Thermal-Ribbon sensors in the "Sensors, Controllers & Accessories" section.
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Description
Features
Options
Surface Mount RTDs and Thermistors
Miniature sensors mounted via surface mount technology
Low installed costs Geared for medium to high volumes Fast time response Stable and accurate
Sizes: 0805, 0603, 0402 RTD:100fi and 1Kfi platinum; ±0.06% or ± 0.12% at 0°C (DIN class A or B) Thermistor: 10Kfi and 50Kfi ;
±1% at 25°C
Thin-film RTDs
Small ceramic elements laminated inside the heater or located on top
Highly stable and accurate Standardized output Low cost
Tight resistance tolerance
Platinum, 0.00385 TCR 100 to 10,000 fi
Wire leads or SMT
0.12% or 0.06% tolerance
Can average temperatures along length of sensor Any resistance possible
Platinum, nickel, nickel-iron
Strip-wound RTD
Sensing wire wound around a flexible insulating strip and encapsulated inside heater
Flat-wound RTD
Sensing wire laid in a predetermined pattern in a single plane
Platinum, nickel, nickel-iron Uniform or profiled
Fast response (0.1 sec.) Can average temperatures along length of sensor
Etched RTD
Heater and RTD etched from same temperature sensitive foil
Lowest cost
Fast response
Can average temperatures
along length of sensor
Nickel or nickel-iron
Thermistor
Bare or coated bead embedded in heater or placed on top and covered with epoxy
High sensitivity Low to moderate cost
NTC or PTC
Variety of resistances
Bead or SMT
Minimal space required Rugged Construction Wide temperature range
Junction of dissimilar metals laminated inside heater
Wire or foil
E, J, K, or T standard
Low cost basic heater control or thermal cutoff
No external controller Low system cost
Snap action or creep action Specify setpoint Wired/mounted to heater See thermostat options on page 57
Specifications subject to change
Access: Minco
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