Explosion-proof and intrinsic safety type thermocouple
Explosion-proof and intrinsic safety type thermocouple
Brief Description

WRN-440 Explosion-proof and intrinsic safety type thermocouple is a temperature sensor, widely applied in the chemical industrial automatic control system. It transfers the object temperature to electrical signal, and sends it to display, record and adjus

Details

In chemical plant, the production field is often accompanied with various inflammable, explosive chemical gas & steam, it’s not safe to use common thermocouple which is easy to result in gas explosion. Therefore, explosion-proof and intrinsic safety type thermocouple is necessary. Our explosion-proof and intrinsic safety type thermocouple are used in these dangerous occasions of which temperature group zone are dII BT4 ~ dII CT6, ib II BT4, ia ll BT4, ia ll CT6.

Model

Graduation

Range ℃

Accuracy

Allowable deviation

WRN,WRNK WRN2,WRNK2

 

K

0～800℃

I

±1 5℃ or ±0. 004 t

Ⅱ

±2.5℃ or ±0．0075t

WRE,WREK WRE2,WREK2

 

E

 

0～600℃

I

±1.5℃ or ±0.004t

Ⅱ

±2 5℃ or ±0 0075 t

Specifications

Type

Model

Graduation

Range

 ℃

Specs

Response time

T 0.5s

Nominal pressure MPa

Structure

Exd

grade

Total  length

Lmm

Insert

Depth

 l mm

NiCr-NiSi

WRN-240

WRN2-240

K

0-800

 

150

200

250

300

400

500

750

1000

1500

2000

≤90

10

Exd

Head

 

Fixed

thread

M27×2

dⅡBT4

dⅡBT6

or

dⅡCT4 dⅡCT6

NiCr-CuNi

WRE2-240

WRE-240

E

0-600

NiCr-NiSi

WRN-640 WRN2-640

K

0-600

150

200

250

30

Tapper protection tube, Fixed  thread

M33×2

NiCr-CuNi

WRE-640

WRE2-640

E

0-600

NiCr-NiSi

WRN-440

WRN2-440

K

0-800

150

200

250

300

400

500

750

1000

1500

2000

6.4

Exd

head

Fixed

flange

NiCr-CuNi

WRE-440

WRE2-440

E

0-600

Notes: Exd flange is instrument standard JB/t5219-1991, is RFW