Thermistor Resistances

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.

 

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

 

 

Resistances of Thermistors Manufacturers C-P

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 Chaffoteaux, Ferroli, Gemini, Glowworm, Halstead, Herman, ICI, Ideal, Johnson and Starley, Keston, Myson, Potterton.

 

Manufacturer Model/Range Sensor Type Approx Temperature  °C Expected Resistance Reading Approx Temperature °C Expected Resistance Reading
Chaffoteaux Britony 80 & 100 NTC Sensor 10 9.9 k 80 630
Chaffoteaux Britony SE80, SE100 NTC Sensor 10 9.9 k 80 630
Chaffoteaux Britony system 40 & 60 NTC Sensor 10 9.9 k 80 630
Chaffoteaux Calydra 80, 100 & 80 MK2 NTC Sensor 10 9.9 k 80 630
Ferroli  F 30 B & F 24 B NTC Sensor 20 12 k 80 1.5 k
Ferroli 76FF 77CF  100FF PTC Sensor 10 890 80 1.5 k
Ferroli 77FF & Popular PTC Sensor 10 890 80 1.5 k
Ferroli Domicompact F24 -F30B NTC Sensor 20 12 80 1.5 k
Ferroli Domina 80N, 80N DGT & 80e NTC Sensor 10 20 k 80 1.25 k
Ferroli Falcon 80 & Falcon II NTC Sensor 10 20 k 80 1.25 k
Ferroli Hawk, Hawk II, Xignal PTC Sensor 10 890 80 1.5 k
Ferroli Maxima 35c-35s NTC Sensor 25 10 k 60 2.5 k
Ferroli Modena 80e & 102 NTC Sensor 0 31 k 100 680
Ferroli Optima range PTC Sensor 10 890 80 1.5 k
Ferroli Optimax NTC Sensor 25 10 k 60 2.5 k
Ferroli Sigma FF range NTC Sensor 20 1 M 80 80 k
Ferroli Tempra NTC Sensor 10 20 k 80 1.25 k
Gemini 960E NTC Sensor 5 10
GlowWorm 330+ NTC Sensor 25 10 k 85 1.2 k
GlowWorm 54/4 BBU  &  45/4 BBU NTC Sensor 20 14 k 80 2.5 k
GlowWorm Compact 75e, 80e  & 100e NTC Sensor 25 10 k 80 2.5 k
GlowWorm Compact 75P, 80P, & 100P NTC Sensor 25 10 k 80 2.5 k
GlowWorm Compact system 60ss, 100ss NTC Sensor 25 10 k 80 2.5 k
GlowWorm Energysaver 80/100 & 80Mk2/100 Mk2 NTC Sensor 0 35.4 k 80 1.7 k
GlowWorm Express 80 & Swiftflow 80 NTC Sensor 20 10 k 80 2.5 k
GlowWorm Flexicom CX NTC Sensor 10 10k 80 1k
GlowWorm Flexicom HX NTC Sensor 20 12k 80 1.4k
GlowWorm Jaguar 23, 28 NTC Sensor 15 16 k 80 1 k
GlowWorm Micron NTC Sensor 20 14 k 80 2.5 k
GlowWorm Swiftflow 100 NTC Sensor 20 10 k 80 2.5 k
GlowWorm Swiftflow 125e NTC Sensor 20 10 k 80 2.5 k
GlowWorm Swiftflow 75 NTC Sensor 20 10 k 80 2.5 k
GlowWorm Swiftflow 80e & 100e NTC Sensor 20 10 k 80 2.5 k
GlowWorm XI  Range NTC Sensor 25 10 k
GlowWorm Xtra fast 96 & 120 NTC Sensor 10 19.8 k 80 1.2 k
Halstead Ace HE NTC Sensor 20 5 k 80 400
Halstead Best + Wickes NTC Sensor 20 1 M
Halstead Quattro, Quattro Gold, & LPG NTC Sensor 20 15 k
Herman Eura HE NTC Sensor 20 12 k 100 2.5 k
Herman Eura HE NTC Sensor 20 12 k 100 2.5 k
Herman Supermicra 24-30 HE NTC Sensor 0 33 k 80 1.3 k
Herman Supermicra 24-30 HE NTC Sensor 0 33 k 80 1.3 k
HRM Boilers Quantum DB NTC Sensor 25 10 k
ICI Caldaie Solar 2000 NTC Sensor 20 10 k
ICI Caldaie Solar 80E  96E  &      Solar Twin NTC Sensor 20 10 k
Ideal C80FF & C95FF  Wickes C80FF, C95FF PTC Sensor 20 200 k 80 2.5 k
Ideal Classic Classic HE9-HE12-HE15 HE18 NTC Sensor 20 10 k 80 1.2 k
Ideal Europa NTC Sensor 15 15 k 82 1.5 k
Ideal Henrad CC80FF  CC100FF CC120FF NTC Sensor 25 11 k 80 1 k
Ideal Isar, Icos & Icos system NTC Sensor 25 9.7 -10.3  k 85 1 k
Ideal Logic code combi 26,33,38 NTC Sensor 25 10k 80 1.25k
Ideal Mini NTC Sensor 15 15 k 82 1.5 k
Ideal Response 80, 100, 120 NTC Sensor 25 11 k 80 1 k
Ideal Sprint Rapide RS 75N NTC Sensor 25 10 k
Ideal Systemiser SE PTC Sensor 20 950 80 12 k
Johnson & Starley Reno 16H NTC Sensor 20 10.14 k 80 1.2 k
Johnson & Starley Reno HE 16S NTC Sensor 20 10.14 k 80 1.2 k
Johnson & Starley Reno HE 31H NTC Sensor 20 10.14 k 80 1.2 k
Johnson & Starley Reno HE 31S NTC Sensor 20 10.14 k 80 1.2 k
Johnson & Starley Reno HE 37C NTC Sensor 20 10.14 k 80 1.2 k
Keston C36 Combi NTC Sensor 20 12k 80 1.5k
Keston 30C NTC Sensor 25 10k 80 1k
Keston C40,C40P,C55,C55P NTC Sensor 25 20 k 80 11 k
Myson Midas B NTC Sensor 20 30 k 80 1 k
Myson Midas Si  & Sfi PTC Sensor 20 3 k 80 64 k
Potterton Combi 80, Combi 100 NTC Sensor 20 15 k 80 7 k
Potterton Envoy NTC Sensor 20 15 k 80 2 k
Potterton Kingfisher MF range of boilers NTC Sensor 25 1.2 M 80 100 k
Potterton Lynx RS & Lynx 2 NTC Sensor 20 12 k 80 7 k
Potterton Performa /Performa System NTC Sensor 25 11 k
Potterton Promax FSB 30 HE Flow O/heat stat 110 0
Potterton Promax FSB 30 HE NTC Sensor 25 20 k 80 500
Potterton Promax range of boilers NTC Sensor 20 20 k 80 0.5 k
Potterton Puma (all models) NTC Sensor 20 15 k
Potterton Suprima range of boilers NTC Sensor 25 1 m 82 73 k

 

 

 

Resistances of Thermistors Manufacturers R-W

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 Ravenheat, Radiant, Saunier Duval, Sime, Viessman, Vaillant, Vokera and Worcester.

 

Manufacturer Model/Range Sensor Type Approx Temperature  °C Expected Resistance Reading Approx Temperature °C Expected Resistance Reading
Radiant RSF  RCM  RSM Ranges NTC Sensor 25 10 k
Ravenheat CSI  Range NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat CSI 120 NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat HE Range NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat LS  Range NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat RSF 82 ET NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat RSF 84ET NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat Silver Star NTC Sensor 20 12.5 k 80 1.5 k
Ravenheat White Star NTC Sensor 20 12.5 k 80 1.5 k
Saunier Duval Combitek F23E NTC Sensor 0 32.6 k 100 680
Saunier Duval Ecosy 2 28E NTC Sensor 0 35.4 k 80 1.7 k
Saunier Duval Ecosy SB,  24E  &    28E NTC Sensor 0 35.4 k 110 749
Saunier Duval Isofast F28E,F35E,F28E/1 & F35E/1 NTC Sensor 0 32.6 k 80 1.2 k
Saunier Duval Protherm 80EC 100EC NTC Sensor 20 10 k
Saunier Duval SD 623 High limit thermistor 20 5-7
Saunier Duval SD30e NTC Sensor 25 10 k 80 2.5 k
Saunier Duval Sylva FF 24E NTC Sensor 0 32.6 k 80 1.2 k
Saunier Duval Thelia 623 NTC Sensor 20 11 k 60 2.5 k
Saunier Duval Thelia 623 PTC Sensor 20 40 60 8 k
Saunier Duval Thema F SB 23E NTC Sensor 0 32.5 k 80 920
Saunier Duval Thema F23E, C23 combitek F32E NTC Sensor 0 33 k 80 1.2 k
Sime Eco comfort HE + NTC Sensor 20 12 k 80 1.6 k
Sime Format Combi 30HE NTC Sensor 20 12 k 80 1.6 k
Sime Format System 25HE NTC Sensor 20 12 k 80 1.6 k
Sime Friendly Format, Format 80E + 100E NTC Sensor 20 12 k 80 1.6 k
Sime Murelle HE NTC Sensor 20 12 k 80 1.6 k
Sime Planet  Dewy/Super 4 WM NTC Sensor 20 12 k 80 1.6 k
Sime Super 90, Super 4 & Friendly NTC Sensor 20 12 k 80 1.6 k
Vaillant eco TEC plus 612, 615, 618, 624 & 630 (System Boilers) NTC Sensor 20 10 k
Vaillant eco TEC pro 28, plus 824 & 831 (Combi Boilers) NTC Sensor 20 10 k 80 1.3k
Vaillant Ecomax NTC Sensor 25 2.2 k 90 250
Vaillant Sine 18, VCW 242/221 range NTC Sensor 30 2 k 90 250
Vaillant Turbomax 242E NTC Sensor 30 2 k 80 270
Viessmann Vitodends 100 WB1A NTC Sensor 15 20 k 80 1.5 k
Viessmann Vitodends 200 WB2A NTC Sensor 15 20 k 80 1.5 k
Vokera Compact 24/28 NTC Sensor 15 15 k 82 1.5 k
Vokera Compact 28 NTC Sensor 15 15 k 82 1.5 k
Vokera Compact HE 25/29 NTC Sensor 20 15 k 82 1.5 k
Vokera Compact HE 25/29 NTC Sensor 20 15 k 82 1.5 k
Vokera Excell 80e & 96e all serial numbers NTC Sensor 15 15 k 82 1.5 k
Vokera Linea 24/28 NTC Sensor 15 15 k 82 1.5 k
Vokera Linea 25-30-35 HE NTC Sensor 15 15 k 82 1.5 k
Vokera Linea 726 NTC Sensor 15 15 k 82 1.5 k
Vokera Linea plus & Linea Plus AG NTC Sensor 15 15 k 82 1.5 k
Vokera Linea plus /726/730/735 NTC Sensor 15 15 k 82 1.5 k
Vokera Maxin 24E/ 28E/24CF NTC Sensor 15 15 k 82 1.5 k
Vokera Mynute 10e/14e/16e/20e NTC Sensor 15 15 k 82 1.5 k
Vokera Option 24 NTC Sensor 15 15 k 82 1.5 k
Vokera Rain NTC Sensor 15 15 k 82 1.5 k
Vokera Sabre NTC Sensor 15 15 k 82 1.5 k
Vokera Synergy 29e NTC Sensor 15 15 k 82 1.5 k
Vokera Syntesi 29/35/25/29/25e NTC Sensor 15 15 k 82 1.5 k
Vokera ProCombi A NTC Sensor 20 10k 82 1.5 k
Vokera ProCombi A NTC Sensor 20 10k 82 1.5 k
Vokera Excell NTC Sensor 15 15 k 82 1.5 k
Wickes Wickes C80FF & C95FF PTC Sensor 20 200 k 80 2.5 k
Worcester / Bosch 350 NTC Sensor 25 10 k
Worcester / Bosch 15-18 RI System NTC Sensor 25 14 k 82 1.5 k
Worcester / Bosch 24 CDI NTC Sensor 20 30 k 80 1 k
Worcester / Bosch 240RSF & 280RSF PTC Sensor 20 1.5 k 80 25 k
Worcester / Bosch 24i NTC Sensor 20 33 k 80 680
Worcester / Bosch 24i/28i Junior NTC Sensor 20 25 k 80 1 k
Worcester / Bosch 280 RSF NTC Sensor 20 25 k 80 1.5 k
Worcester / Bosch 28Si II / RD 628 NTC Sensor 20 30 k 80 1 k
Worcester / Bosch 9.24 Electronic RSF Economy PTC Sensor 5 8 k 80 25 k
Worcester / Bosch 9.24 series NTC Sensor 20 13 k 80 3 k
Worcester / Bosch Cdi range, Ci range, Si range & C1 NTC Sensor 20 30 k 80 1 k
Worcester / Bosch Greenstar (all models) NTC Sensor 20 14.7 k 80 1.7 k
Worcester / Bosch Greenstar (all models) Outside temp sensor -20 2.4 k 25 436
Worcester / Bosch Greenstar Cdi NTC Sensor 20 14 k 80 1.5 k

 

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