# Resistance thermometer for flue gas temperature measurements — TR81

> Resistance thermometer for flue gas temperature measurements with thermowell model TW81, suitable for gaseous media up to 1 bar, with replaceable measuring insert and optional transmitter.

- Catalog code: tr81
- Model: TR81
- Category: Temperature measurement › Resistance thermometers
- Product page: https://avigan.com.ua/wika/en/products/tr81
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

Model TR81 Resistance thermometer for flue gas temperature measurements ✓ With thermowell model TW81 ✓High quality ►To the information!

## Applications

- Blast furnaces, hot blast stoves
- Annealing and heat treatment processes
- Waste and hazardous waste incineration
- Large heating systems, heat generation

## Special features

- Application ranges up to +600 °C [+1,112 °F]
- Thermowell from heat-resistant steel
- Measuring insert replaceable
- Gas-tight process connection (option)

## Specifications

| Parameter | Value |
|---|---|
| model | TR81 |
| product family | TR |
| short description | Resistance thermometer for flue gas temperature measurements with thermowell model TW81, suitable for gaseous media up to 1 bar, with replaceable measuring insert and optional transmitter. |
| subcategory | straight resistance thermometer |
| certifications | RoHS; EU declaration of conformity; EMC directive EN 61326; CE; EAC; INMETRO; NEPSI; KC; PESO; DNOP-MakNII; GOST; KazInMetr; MTSCHS; BelGIM; UkrSEPRO; Uzstandard |
| explosion protection | [II 2G Ex eb IIC T1 ... T6 Gb]; [II 3G Ex ec IIC T1 ... T6 Gc X]; [II 3D Ex tc IIIC TX °C Dc X]; [II 1G Ex ia IIC T1 ... T6 Ga]; [II 1/2G Ex ia IIC T1 ... T6 Ga/Gb]; [II 2G Ex ia IIC T1 ... T6 Gb]; [II 1D Ex ia IIIC T125 ... T65 °C Da]; [II 1/2D Ex ia IIIC T125 ... T65 °C Da/Db]; [II 2D Ex ia IIIC T125 ... T65 °C Db]; [II 2D Ex tb IIIC TX °C Db]; [II 3G Ex nA IIC T1 ... T6 Gc X]; IECEx; EAC; INMETRO; NEPSI; KCs-KOSHA; PESO; DNOP-MakNII; [II 1G Ex iia IIC T1 ... T6 Ga]; [II 1/2G Ex iia IIC T1 ... T6 Ga/Gb]; [II 2G Ex iia IIC T1 ... T6 Gb]; [II 1D Ex iia IIC T125 ... T65 °C Da]; [II 1/2D Ex iia IIC T125 ... T65 °C Da/Db]; [II 2D Ex iia IIC T125 ... T65 °C Db]; [II 2D Ex tb IIC TX °C Db]; [II 3D Ex tc IIC TX °C Dc X]; [Ex iia IIC T1 ... T6 Ga]; [Ex iia IIC T1 ... T6 Ga/Gb]; [Ex iia IIC T1 ... T6 Gb]; [Ex iia IIC T125 ... T65 °C Da]; [Ex iia IIC T125 ... T65 °C Da/Db]; [0 Ex iia IIC T6 ... T1 Ga X]; [1 Ex iia IIC T6 ... T1 Gb X]; [Ex iia IIC T80 ... T440 °C Da X]; [Ex iia IIC T80 ... T440 °C Db X]; [Ex nA IIC T6 ... T1 Gc X]; [Ex iia IIC T3 ... T6 Ga]; [Ex iia IIC T3 ... T6 Ga/Gb]; [Ex iia IIC T3 ... T6 Gb]; [Exia IIC T1~~T6Ga]; [Exia IIC T1~~T6Ga/Gb]; [Exia IIC T1~T6Gb]; [Exia IIC T4...T6]; [Exib IIC T4...T6]; [II1G Exia IIC T3...T6Ga]; [II1/2G Exia IIC T3...T6Ga/Gb]; [II2G Exia IIC T3...T6Gb]; [II1D Exia IIIC T125...T65℃Da]; [II1/2D Exia IIIC T125...T65℃Da/Db]; [II2D Exia IIIC T125...T65℃Db] |
| safety integrity level | SIL 2 |
| ambient temp | -20 … 85 °C |
| ip rating | IP53 |
| languages in datasheet | en |
| temperature ranges | -196 … 600 °C; -100 … 450 °C; -50 … 250 °C; -50 … 500 °C; -30 … 300 °C; 0 … 150 °C |
| sensor type | Pt100 |
| sensor class | A |
| probe length mm | 2000 |
| probe diameter mm | 15 |
| probe material | stainless steel; carbon steel 1.0305; stainless steel 1.4571; stainless steel 1.4841; stainless steel 1.4762; Stainless steel |
| has thermowell | true |
| thermowell material | carbon steel 1.0305; carbon steel 1.0305 enamelled; stainless steel 1.4571; stainless steel 1.4841; stainless steel 1.4762; Carbon steel 1.0305; Carbon steel 1.0305, enamelled; Stainless steel 1.4571; Stainless steel 1.4841; Stainless steel 1.4762 |
| thermowell form | Form B |
| process connections | stop flange; threaded bushing; G 1; G 1½; G ½; G ¾; 1 ½ inch, 150 lbs, RF; 1 ½ inch, 300 lbs, RF; 2 inch, 150 lbs, RF; 2 inch, 300 lbs, RF; 3 inch, 150 lbs, RF; 3 inch, 300 lbs, RF; 4 inch, 150 lbs, RF; 4 inch, 300 lbs, RF; Stop flange; Threaded bushing; Mating flange; Flange welded to thermowell |
| process temp | -196 … 600 °C |
| output signal | 4-20mA; HART; FOUNDATION Fieldbus; PROFIBUS-PA; PROFIBUS PA |
| power supply | varies by transmitter model |
| electrical connection | M20 x 1.5 |
| accuracy class | Class B |

## Datasheet tables

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity ■ EMCdirective 1) EN 61326 emission (group 1, class B) and immunity (industrial application) | European Union |
|  | IECEx (option) - in conjunction with ATEX Hazardous areas - Ex i Zone | International |
|  | Zone 21 dust [Ex ia IIIC T125 ...T65 °C Db] EAC (option) Hazardous areas | Eurasian Economic Community |
|  | INMETRO (option) Hazardous areas - | Brazil |
|  | - Ex n Zone 2 gas [Ex nA IIC T6 ...T1 Gc X] Ex i Zone 0 gas [Ex ia IIC T3 ...T6 Ga] |  |

| Logo | Description | Country |
|---|---|---|
|  | NEPSI (option) Hazardous areas - Ex i Zone 0 gas [Ex ia IIC T1 ~ T6 Ga] | China |
|  | KCs - KOSHA (option) Hazardous areas - Ex i Zone 0 gas [Ex ia IIC T4 ...T6] Zone 1 gas [Ex ib IIC T4 ...T6] | South Korea |
| - | PESO (option) Hazardous areas Ex i Zone 0 gas [Ex ia IIC T1 ...T6 Ga] Zone 1 mounting to zone 0 gas [Ex ia IIC T1 ...T6 Ga/Gb] | India |
|  | DNOP - MakNII (option) Hazardous areas Ex i Zone 0 gas [II 1G Ex ia IIC T3 ...T6 Ga] Zone 1 mounting to zone 0 gas [II 1/2G Ex ia IIC T3 ...T6 Ga/Gb] | Ukraine |
|  | GOST (option) Metrology, measurement technology | Russia |
|  | KazInMetr (option) Metrology, measurement technology | Kazakhstan |
| - | MTSCHS (option) Permission for commissioning | Kazakhstan |
|  | BelGIM (option) Metrology, measurement technology | Belarus |
|  | UkrSEPRO (option) Metrology, measurement technology | Ukraine |
|  | Uzstandard (option) Metrology, measurement technology | Uzbekistan |

| Logo | Description |
|---|---|
|  | SIL 2 Functional safety (only in conjunction with model T32 temperature transmitter) |
| NAMUR | NAMUR NE24 Hazardous areas (Ex i) |

### Connection method

| Single elements | 1 x 2-wire 1 x 3-wire 1 x 4-wire |
|---|---|
| Dual elements | 2 x 2-wire 2 x 3-wire 2 x 4-wire 2) |

### Accuracy class / Range of use of the sensor per EN 60751

| 1 | 2 | 3 |
|---|---|---|
| Class | Sensor construction |  |
|  | Wire-wound | Thin-film |
| Class B | -196 ...+600 °C | -50 ...+500 °C |
| Class A 3) | -100 ...+450 °C | -30 ...+300 °C |
| Class AA 3) | -50 ...+250 °C | 0 ... 150 °C |

| Model | Material | Cable entry thread size | Ingress protection 1) | Cap | Surface |
|---|---|---|---|---|---|
| BS | Aluminium | M20 x 1.5 | IP53, IP65 | Cap with 2 screws | Blue, lacquered 2) |
| BSZ | Aluminium | M20 x 1.5 | IP53, IP65 | Hinged cover with cylinder head screw | Blue, lacquered 2) |
| BSZ-H | Aluminium | M20 x 1.5 | IP53, IP65 | Hinged cover with cylinder head screw | Blue, lacquered 2) |

| Model | Description | Data sheet |
|---|---|---|
| T15 | Digital transmitter, PC configurable | TE 15.01 |
| T32 | Digital transmitter, HART ® protocol | TE 32.04 |
| T53 | Digital transmitter, FOUNDATION Fieldbus and PROFIBUS ® PA | TE 53.01 |
| T91.10 | Analogue transmitter, fixed measuring range | TE 91.01 |

| 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| Connection head | Transmitter model |  |  |  |
| T15 | T32 | T53 | T91.10 |  |
| BS | - | - | - | - |
| BSZ | - | - | - | - |
| BSZ-H | ● | ● | ● | ● |

### Metal thermowell

| Outer diameter | Wall thickness |
|---|---|
| Ø F | s |
| 22 | 2 |
| 15 | 2 |

| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|
| Material | AISI | Applicable | Resistance against |  |  |  |
| No. | No. | in air | Sulphurous gases | Nitrogen-containing gases with low oxygen content | Carburisation |  |
|  |  | up to °C | Oxidising | Reducing |  |  |
| 1.0305 | - | 550 | low | slight | medium | slight |
| 1.4571 | 316 Ti | 800 | slight | slight | medium | medium |
| 1.4762 | - | 1,200 | very high | high | slight | medium |
| 1.4841 | 310 / 314 | 1,150 | very slight | very slight | high | slight |

| Material No. | Range of applications |
|---|---|
| 1.0305 (St35.8) | Tempering furnaces for heat treatment plants, galvanising and tinning plants, carbon-dust-air mixture pipelines in steam power stations |
| 1.0305 enamelled (St35.8 enamelled) | Flue-gas desulphurisation plants, babbitt metal, lead and tin smelters |
| 1.4762 X 10 CrAISi 25 | Combustion exhaust gases, cement and ceramic furnaces, heat treatment plants, annealing furnaces |
| 1.4749 X 18 CrNi 28 | Flue gas ducts, annealing furnaces |
| 1.4841 X 15 CrNiSi 25-21 | Combustion chambers, industrial furnaces, petrochemical industry, hot blast stoves, cyanide baths |

| 1 | 2 | 3 | 4 |
|---|---|---|---|
| Thermowell | Dimensions inmm | Process connection |  |
| External Ø | Ø f/f 4 | i min. | E |
| 22 | 22.5 | 20 | G1,1G1½ |
| 15 | 15.5 | 20 | G½,G¾,G1 |

| 1 | 2 | 3 |
|---|---|---|
| Thermowell | Dimensions inmm |  |
| External Ø | Ø f/f 4 | C (hole) |
| 22 | 22.5 | 70 |
| 15 | 15.5 | 55 |

| Flange diameter | Material |
|---|---|
| 1 ½inch, 150 lbs, RF | Stainless steel 316 |
| 1 ½inch, 300 lbs, RF | Stainless steel 316 |
| 2 inch, 150 lbs, RF | Stainless steel 316 |
| 2 inch, 300 lbs, RF | Stainless steel 316 |
| 3 inch, 150 lbs, RF | Stainless steel 316 |
| 3 inch, 300 lbs, RF | Stainless steel 316 |
| 4 inch, 150 lbs, RF | Stainless steel 316 |
| 4 inch, 300 lbs, RF | Stainless steel 316 |

## Documents

- [ds_te6081_en_co_c6780d](https://avigan.com.ua/wika/docs/wika/ds_te6081_en_co.pdf) — PDF, 649 KB, en