Component Close Up: Thermistor Resistances A-B

 

Resistances of Thermistors Manufacturers A-B

Following on from "Testing a boiler thermistor" in Thermistors, please use the readings in the table below as an approximate expected multimeter reading of different thermistors from from the respective model as indicated. Manufacturers include Alpha, Ariston, Baxi, Broag, Biasi, British Gas, Boulter Buderus.

For more manufacturers please click: Thermistor Readings C-P, or Thermistor Readings R-W

 

Manufacturer

Model/Range

Sensor Type

Approx Temperature  °C

Expected Resistance Reading

Approx Temperature °C

Expected Resistance Reading

Alpha

240 / 240Eco / 240E

NTC Sensor

25

14 k

82

3 k

Alpha

240P

NTC Sensor

25

14 k

82

3 k

Alpha

240XP/240XE/240X

NTC Sensor

25

14 k

82

3 k

Alpha

280E / 280P

NTC Sensor

25

14 k

82

3 k

Alpha

500E

NTC Sensor

25

14 k

82

3 k

Alpha

CB 25

NTC Sensor

25

14 k

82

3 k

Alpha

CB 33

NTC Sensor

25

14 k

82

3 k

Alpha

CB24/X  CB28/X

NTC Sensor

25

14 k

82

3 k

Alpha

CB50

NTC Sensor

25

14 k

82

3 k

Alpha

CD18R

NTC Sensor

25

14 k

82

3 k

Alpha

CD24C

NTC Sensor

25

14 k

82

3 k

Alpha

SY24

NTC Sensor

25

14 k

82

3 k

Ariston

Compact 400  20/1MFS

NTC Sensor

15

15 k

82

1.5 k

Ariston

DIA 20 MFFICE

NTC Sensor

20

15 k

80

1.5 k

Ariston

E Combi

NTC Sensor

20

15 k

80

1.5 k

Ariston

Eco Genus 24 RFFI

Heating Probe

30

8.1 k

80

1.1 k

Ariston

Eco Genus 24MFFI

Heating Probe

30

8.1 k

80

1.1 k

Ariston

Genus 27BFFI, Genus 27BFFI Plus

NTC Sensor

20

15 k

80

1.5 k

Ariston

Micro Combi 23MFFI

NTC Sensor

30

8.1 k

80

1.1 k

Ariston

Micro Genus 23MFFI, Micro Genus 27MFFI

NTC Sensor

10

18 k

80

1.9 k

Ariston

Misc

NTC Sensor

20

15 k

80

1.5 k

Baxi

100HE

NTC Sensor

20

20 k

80

0.5 k

Baxi

Bahama

NTC Sensor

20

19.9 k

80

680

Baxi

Barcelona, Barcelona system

NTC Sensor

20

20 k

80

0.5 k

Baxi

Bermuda 51/5

NTC Sensor

25

10 k

 

 

Baxi

Combi 105E, Combi instant 105E

NTC Sensor

25

11 k

 

 

Baxi

Combi 80 Eco

NTC Sensor

25

11 k

 

 

Baxi

DUO-TEC/Platinum

NTC Sensor

25

10k

85

0.5k

Baxi

Genesis 80 & 96

NTC Sensor

10

9.9 k

80

630

Baxi

HE

NTC Sensor

20

13 k

80

0.5 k

Baxi

Maxflow

NTC Sensor

25

11 k

 

 

Baxi

Power Max HE

NTC Sensor

20

12k

80

1k

Baxi

Power Max HE

NTC Sensor

20

12k

80

1k

Baxi

Power Max HE

NTC Sensor

20

15k

75

2k

Baxi

Solo 2 & PP3 Series

NTC Sensor

20

1 M

 

 

Baxi

Solo HE

NTC Sensor

20

11k

82

0.5k

Baxi

System 35/60

NTC Sensor

25

11 k

 

 

Biasi

Concept 400

NTC Sensor

15

15 k

82

1.5 k

Biasi

Parva M90 24S & 28S

NTC Sensor

15

15 k

82

1.5 k

Biasi

Prisma 24S, 24SE, 28S, 28SE

NTC Sensor

15

15 k

82

1.5 k

Biasi

Riva 24S  &  28S

NTC Sensor

15

15 k

82

1.5 k

Biasi

Riva Advance

NTC Sensor

15

15 k

82

1.5 k

Biasi

Riva Compact

NTC Sensor

15

15 k

82

1.5 k

Biasi

Riva Plus

NTC Sensor

15

15 k

82

1.5 k

Biasi

Savio GAIA  424S  & 428S

NTC Sensor

15

15 k

82

1.5 k

Boulter Buderus 

500-24S -24C

NTC Sensor

20

10 k

80

1.5 k

British Gas (Ideal)

RD1

Flow (Red Wires) 

21

12 k

83

1.3 k

British Gas (Ideal)

RD1

Return (Blue Wires)

21

12 k

83

1.3 k

British Gas (Ideal)

RD1

Flue Stat (White Wires)

 

125 k -11k -550

 

 

British Gas (Worcester)

CC1 CS1 27HE 28HE plus 35HE plus

NTC Sensor

0

35.4 k

100

950

British Gas (Worcester)

ICS1 ICC1 ICC2 -532i

Outside temp sensor

-20

2.4 k

25

436

British Gas (Worcester)

ICS1 ICC1 ICC2 -532i

NTC Sensor

0

35.4 k

100

950

British Gas (Worcester)

Inteligent condensing combi

NTC Sensor

0

35.4 k

80

950

British Gas (Worcester)

RD 430I

remote cylinder sensor

40

2.4 k

60

1.9 k

Broag

Avanta Plus Series 

NTC Sensor

25

12 k

82

1.8 k