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TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
Linear Thermistors
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Description

Linear Response Components
For applications requiring thermistors with linear response to temperature change, trodeks offers linear components. These unique devices consist of a thermistor composite for temperature sensing and an external resistor composite for linearizing.

Thermistor composites 44018 and 44019 each contain two thermistors packaged in a single sensor ( PDF Figures 1A & 1B). Thermistor composite 44020 contains three thermistors packaged in a single sensor (PDF Figure 1C).

Resistor composites for use with 44018 and 44019 thermistor composites consist of two metal film resistors of the size shown in Figure 2. Resistor composites for use with the 44020 thermistor composite consist of three of the same type metal film resistors.

Linear components are manufactured with different values for different temperatures ranges. When they are connected in networks shown in Figures 3 and 4, they produce a varying voltage or resistance which is linear with temperature.

One of the basic network manifestations is a voltage divider as in PDF Figure 3A for components other than #44212, and as shown in PDF Figure 3B for component #44212. The area within the dashed lines represents the thermistor composite. The network hookup for linear resistance versus temperature is shown in PDF Figure 4A for linear components except #44212, and in PDF Figure 4B for #44212.

Multiplexing
The 44018 thermistor composite is used in four of the linear components. The part that changes in each component is the resistor composite, which determines the temperature range. Therefore, the 44018 thermistor composite can be used over the entire -30 to 100°C temperature range by simply changing resistor composites. Its accuracy and interchangeability over the full range is ±0.15°C. It is not mandatory that trodeks® resistor composites be used with the 44018 thermistor composite. Any 0.1% resistors of the proper values and with a temperature coefficient of 30 PPM or less may be substituted. In other situations, it is frequently desirable to have thermistor composite temperature sensors at more than one location. When this is required, it is not necessary to have a separate resistor composite for each thermistor composite. It is possible to multiplex any number of thermistor composites through a single resistor composite for greater design flexibility.

PLEASE REVIEW pdf SPEC SHEET for complete product specifications and additional technical details.

  °C °F °C °F
† Linear Components Kit Model No. 44201 44202
Range 0 to 100°C 32 to 212°F -5 to 45°C 23 to 113°F
Thermistor Composite Model No. 44018 44018
Resistor Composite Model No. 44301 44302
Resistor Composite Values R1 = 3200Ω
R2 = 6250Ω 		R1 = 5700Ω
R2 = 12000Ω
Thermistor Accuracy & Interchangeability ±0.15°C
-30 to 100°C 		±0.27°F
-22 to 212°F 		±0.15°C
-30 to 100°C 		±0.27°F
-22 to 212°F
E0 Positive Slope Eout= (+0.0053483 Ein) T +0.13493 Ein Eout= (+0.00297127 Ein) T +0.03985 Ein Eout= (+0.0056846 Ein) T +0.194142 Ein Eout = (+0.00315851 Ein) T +0.093083 Ein
E0 Negative Slope Eout = (-0.0053483 Ein) T +0.86507 Ein Eout = (-0.00297127 Ein) T +0.96015 Ein Eout = (-0.0056846 Ein) T +0.805858 Ein Eout = (-0.00315851 Ein) T +0.906917 Ein
Resistance Mode Rt=(-17.115) T +2768.23 Rt= (-9.508) T +3072.48 Rt=(-32.402) T +4593.39 Rt = (-18,001) T +5169.42
*Ein MAX. 2.0 Volts 3.5 Volts 3.5 Volts
*IT MAX. 625 µA 615µA 615 µA
***Load Resistance Minimum R.L. 3 MΩ 10 MΩ 10 MΩ
Linearity Deviation ±0.216°C ±0.388°F ±0.065°C ±0.12°F
  °C °F °C °F
† Linear Components Kit Model No. 44203 44204
Range -30 to 50°C -22 to 122°F -2 to 38°C +30 to 100°F
Thermistor Composite Model No. 44018 44018
Resistor Composite Model No. 44303 44304
Resistor Composite Values R1 = 18,700Ω
R2 = 35,250Ω 		R1 = 5700Ω
R2 = 12,400Ω
Thermistor Accuracy & Interchangeability ±0.15°C
-30 to 100°C 		±0.27°F
-22 to +212°F 		±0.15°C
-2 to +38°C 		±0.27°F
-22 to +212°F
E0 Positive Slope Eout= 0.0067966 Ein) T +0.34893 Ein Eoout= (+0.00377588 Ein)T +0.228102 Ein Eout= (+0.00563179 Ein) T +0.192439 Ein Eout = (+0.0031289 Ein) T +0.09232 Ein
E0 Negative Slope Eout= 0.0067966 Ein) T +0.65107 Ein Eout= (-0.00377588 Ein) T +0.771898 Ein Eout= (-0.00563179 Ein) T +0.807563 Ein Eout = (-0.0031289 Ein) T +0.90768 Ein
Resistance Mode Rt = (-127.096) T +12175 Rt = (-70.608) T +14435 Rt = (-32.1012) T +4603.1 Rt = (-17,834) T +5173.8
*Ein MAX. 3.0 Volts 4 Volts
*IT MAX. 475 µA 685 µA
***Load Resistance Minimum R.L. 10 MΩ 10 MΩ
Linearity Deviation ±0.16°C ±0.29°F ±0.03°C ±0.055°F
  °C °F °C °F
† Linear Components Kit Model No. 44211A 44212
Range -55 to 85°C -67 to 185°F -50 to 50°C -58 to 122°F
Thermistor Composite Model No. 44019 44020
Resistor Composite Model No. 44311A 44312
Resistor Composite Values R1 = 3550Ω
R2 = 6025Ω 		R1 = 23,100Ω
R2 = 88,200Ω
R3 = 38,000Ω
Thermistor Accuracy & Interchangeability ±0.4°C, 0 to 85°C
±0.8°C, -55 to 0°C 		±0.72, 32 to 185°F,br>±1.44, -67 to 32°F ±0.1°C
-50 to 50°C 		±0.18°F
- 58 to 122°F
E0 Positive Slope Eout= (+0.005068 Ein) T +0.3411 Ein Eout= (+0.002816 Ein) T +0.2510 Ein Eout= (+0.00559149 Ein) T +0.40700 Ein Eout = (+0.00310638 Ein) T +0.30760 Ein
E0 Negative Slope Eout= (-0.005068 Ein) T +0.6589 Ein Eout= (-0.002816 Ein) T +0.7490 Ein Eout= (-0.00559149 Ein) T +0.59300 Ein Eout = (-0.00310638 Ein) T +0.69240 Ein
Resistance Mode Rt = (-17.99) T +2339 Rt = (-9.994) T +2658.8 Rt = (-129.163) T +13698.23 Rt = (-71.757) T +15994.5
*Ein MAX. 2.0 Volts 3.5 Volts
*IT MAX. 833 µA 700 µA
***Load Resistance Minimum R.L. 10 MΩ 10 MΩ
Linearity Deviation ±1.1°C ±2°F 0.15°C (condition A)**
0.08°C (condition B)** 		±0.27°F (A)
±0.15°F (B)
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TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers

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Description
Linear Kit Model Numbers
  
44201 Star
$38.00
Available In 14 Weeks
 
Linear thermistor kit with 0 to 100°C (32 to 212°F) temperature range
  
44202 Star
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Linear thermistor kit with -5 to 45°C (23 to 113°F) temperature range
  
44203 Star
$38.00
Available In 6 Weeks
 
Linear thermistor kit with -30 to 50°C (-22 to 122°F) temperature range
  
44204 Star
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9 In Stock
 
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44211A Star
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Linear thermistor kit with -55 to 85°C (-67 to 185°F) temperature range
  
44212 Star
$91.00
6 In Stock
 
Linear thermistor kit with -50 to 50°C (-58 to 122°F) temperature range
Thermistor Composite Model Numbers
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44018 Star
$29.00
More Than 25 In Stock
 
Thermistor Composite Temperature Range Dependent on Resistor Composite (See pdf Spec Sheet)
  
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Thermistor Composite with -55 to 85°C (-67 to 185°F) temperature range
  
44020 Star
$65.00
More Than 25 In Stock
 
Thermistor Composite with -50 to 50°C (-58 to 122°F) temperature range
Resistor Composite Model Numbers
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44301 Star
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Resistor Composite Model with -5 to 45°C (23 to 113°F) temperature range
  
44303 Star
$13.00
Available In 6 Weeks
 
Resistor Composite Model with -30 to 50°C ( -22 to 122°F) temperature range
  
44304 Star
$13.00
9 In Stock
 
Resistor Composite Model with -2 to 38°C ( +30 to 100°F) temperature range
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44311A Star
Consult Sales  
 
 
Resistor Composite Model with -55 to 85°C (-67 to 185°F) temperature range
  
44312 Star
$20.00
13 In Stock
 
Resistor Composite Model with -50 to 50°C (-58 to 122°F) temperature range
† All amounts shown in USD
 Ordering Example: (1) 44204 Linear thermistor kit with -2 to 38°C (30 to 100°F) temperature range, $38.00
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 Manuals (contact with email : [email protected])
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Description

Description

Linear Response Components
For applications requiring thermistors with linear response to temperature change, trodeks offers linear components. These unique devices consist of a thermistor composite for temperature sensing and an external resistor composite for linearizing.

Thermistor composites 44018 and 44019 each contain two thermistors packaged in a single sensor ( PDF Figures 1A & 1B). Thermistor composite 44020 contains three thermistors packaged in a single sensor (PDF Figure 1C).

Resistor composites for use with 44018 and 44019 thermistor composites consist of two metal film resistors of the size shown in Figure 2. Resistor composites for use with the 44020 thermistor composite consist of three of the same type metal film resistors.

Linear components are manufactured with different values for different temperatures ranges. When they are connected in networks shown in Figures 3 and 4, they produce a varying voltage or resistance which is linear with temperature.

One of the basic network manifestations is a voltage divider as in PDF Figure 3A for components other than #44212, and as shown in PDF Figure 3B for component #44212. The area within the dashed lines represents the thermistor composite. The network hookup for linear resistance versus temperature is shown in PDF Figure 4A for linear components except #44212, and in PDF Figure 4B for #44212.

Multiplexing
The 44018 thermistor composite is used in four of the linear components. The part that changes in each component is the resistor composite, which determines the temperature range. Therefore, the 44018 thermistor composite can be used over the entire -30 to 100°C temperature range by simply changing resistor composites. Its accuracy and interchangeability over the full range is ±0.15°C. It is not mandatory that trodeks® resistor composites be used with the 44018 thermistor composite. Any 0.1% resistors of the proper values and with a temperature coefficient of 30 PPM or less may be substituted. In other situations, it is frequently desirable to have thermistor composite temperature sensors at more than one location. When this is required, it is not necessary to have a separate resistor composite for each thermistor composite. It is possible to multiplex any number of thermistor composites through a single resistor composite for greater design flexibility.

PLEASE REVIEW pdf SPEC SHEET for complete product specifications and additional technical details.

  °C °F °C °F
† Linear Components Kit Model No. 44201 44202
Range 0 to 100°C 32 to 212°F -5 to 45°C 23 to 113°F
Thermistor Composite Model No. 44018 44018
Resistor Composite Model No. 44301 44302
Resistor Composite Values R1 = 3200Ω
R2 = 6250Ω 		R1 = 5700Ω
R2 = 12000Ω
Thermistor Accuracy & Interchangeability ±0.15°C
-30 to 100°C 		±0.27°F
-22 to 212°F 		±0.15°C
-30 to 100°C 		±0.27°F
-22 to 212°F
E0 Positive Slope Eout= (+0.0053483 Ein) T +0.13493 Ein Eout= (+0.00297127 Ein) T +0.03985 Ein Eout= (+0.0056846 Ein) T +0.194142 Ein Eout = (+0.00315851 Ein) T +0.093083 Ein
E0 Negative Slope Eout = (-0.0053483 Ein) T +0.86507 Ein Eout = (-0.00297127 Ein) T +0.96015 Ein Eout = (-0.0056846 Ein) T +0.805858 Ein Eout = (-0.00315851 Ein) T +0.906917 Ein
Resistance Mode Rt=(-17.115) T +2768.23 Rt= (-9.508) T +3072.48 Rt=(-32.402) T +4593.39 Rt = (-18,001) T +5169.42
*Ein MAX. 2.0 Volts 3.5 Volts 3.5 Volts
*IT MAX. 625 µA 615µA 615 µA
***Load Resistance Minimum R.L. 3 MΩ 10 MΩ 10 MΩ
Linearity Deviation ±0.216°C ±0.388°F ±0.065°C ±0.12°F
  °C °F °C °F
† Linear Components Kit Model No. 44203 44204
Range -30 to 50°C -22 to 122°F -2 to 38°C +30 to 100°F
Thermistor Composite Model No. 44018 44018
Resistor Composite Model No. 44303 44304
Resistor Composite Values R1 = 18,700Ω
R2 = 35,250Ω 		R1 = 5700Ω
R2 = 12,400Ω
Thermistor Accuracy & Interchangeability ±0.15°C
-30 to 100°C 		±0.27°F
-22 to +212°F 		±0.15°C
-2 to +38°C 		±0.27°F
-22 to +212°F
E0 Positive Slope Eout= 0.0067966 Ein) T +0.34893 Ein Eoout= (+0.00377588 Ein)T +0.228102 Ein Eout= (+0.00563179 Ein) T +0.192439 Ein Eout = (+0.0031289 Ein) T +0.09232 Ein
E0 Negative Slope Eout= 0.0067966 Ein) T +0.65107 Ein Eout= (-0.00377588 Ein) T +0.771898 Ein Eout= (-0.00563179 Ein) T +0.807563 Ein Eout = (-0.0031289 Ein) T +0.90768 Ein
Resistance Mode Rt = (-127.096) T +12175 Rt = (-70.608) T +14435 Rt = (-32.1012) T +4603.1 Rt = (-17,834) T +5173.8
*Ein MAX. 3.0 Volts 4 Volts
*IT MAX. 475 µA 685 µA
***Load Resistance Minimum R.L. 10 MΩ 10 MΩ
Linearity Deviation ±0.16°C ±0.29°F ±0.03°C ±0.055°F
  °C °F °C °F
† Linear Components Kit Model No. 44211A 44212
Range -55 to 85°C -67 to 185°F -50 to 50°C -58 to 122°F
Thermistor Composite Model No. 44019 44020
Resistor Composite Model No. 44311A 44312
Resistor Composite Values R1 = 3550Ω
R2 = 6025Ω 		R1 = 23,100Ω
R2 = 88,200Ω
R3 = 38,000Ω
Thermistor Accuracy & Interchangeability ±0.4°C, 0 to 85°C
±0.8°C, -55 to 0°C 		±0.72, 32 to 185°F,br>±1.44, -67 to 32°F ±0.1°C
-50 to 50°C 		±0.18°F
- 58 to 122°F
E0 Positive Slope Eout= (+0.005068 Ein) T +0.3411 Ein Eout= (+0.002816 Ein) T +0.2510 Ein Eout= (+0.00559149 Ein) T +0.40700 Ein Eout = (+0.00310638 Ein) T +0.30760 Ein
E0 Negative Slope Eout= (-0.005068 Ein) T +0.6589 Ein Eout= (-0.002816 Ein) T +0.7490 Ein Eout= (-0.00559149 Ein) T +0.59300 Ein Eout = (-0.00310638 Ein) T +0.69240 Ein
Resistance Mode Rt = (-17.99) T +2339 Rt = (-9.994) T +2658.8 Rt = (-129.163) T +13698.23 Rt = (-71.757) T +15994.5
*Ein MAX. 2.0 Volts 3.5 Volts
*IT MAX. 833 µA 700 µA
***Load Resistance Minimum R.L. 10 MΩ 10 MΩ
Linearity Deviation ±1.1°C ±2°F 0.15°C (condition A)**
0.08°C (condition B)** 		±0.27°F (A)
±0.15°F (B)
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