21.06

are designed for temperature measurement in liquid and gaseous non-corrosive media, and also corrosive media that do not damage protective cover material.
Depending on modification the sensor can be equipped with welded fitting. Sensors without mounting elements are recommended to be equipped with movable fitting UNKJ 031, 041, or movable flange UNKJ 030 (see section 10 "UNKJ mounting fittings"). Nominal pressure is rated according to mounting element. 01.08 sensor can be equipped with mounting threaded flange UNKJ 039 (see  page 10-2).
High-temperature CTх 01.16 sensor is equipped with assembly heat-resistant thermowell. Assembly thermowell is recommended for heat-resistant tube consumption reduction and thermocouple cost saving.  One part of thermowell insertion length is made of heat-resistant alloy CrNi45U,alloy Kanthal АРМ or AISI 310 steel, and other (low-temperature) part is made of 12Cr18Ni10Т stainless steel or similar. Two thermowell parts are welded together by argon-arc welding. Temperature at welding point during operation should not exceed 700°С.
CTK 01.06 and 01.16 with thermowell made of heat-resistant steel AISI 310 are recommended for temperature up to 1100°С instead of thermocouple with more expensive thermowell made of CrNi45U and Kanthal АРМ alloy.
01.06 and 01.16 sensors can be dismantled. Temperature-sensing elements CTK 01.01-006 can be supplied separately. 01.06 and 01.16 sensors have angle versions 01.06A and 01.16A with 90° bend. 01.06A and 01.16A modifications can not be dismantled. For further details see "Alternative designs & Ordering information" below.
Thermocouple design with AISI 310 steel thermowell is covered by utility model patent No. 41190.
21.06, 21.08 and 21.16 temperature sensors are recommended if precision temperature measurement is required. Such precision is achieved due to periodic calibration or verification. They are similar to 01.06 and 01.16 modifications, and have the same technical specification.
21.xx temperature sensor has an additional channel for control or reference thermocouple installation next to temperature-sensing element inside thermowell. Such construction allows to calibrate temperature-sensing element without thermocouple dismantling according to MI 3091--2007 (see pages 2-16). CETN 01 or CETN 02 are used as reference thermocouples (see section 8).
CTxx 21.XX thermocouple design is covered by patent for invention No. 2299408.
Explosion-proof versions 0ExiaIICT6 X or 1ExdIICT6 according to GOST 30852.10-2002 are available (except for 21.06, 21.08, 21.16 modifications). For further details see "Alternative designs & Ordering information" below.
Terminal heads can be equipped with transmitters with 4-20 mА DC output signal and/or digital signal via HART, PROFIBUS-PA, FOUNDATION Fieldbus protocol. It is recommended to use heads of 16, 23, 28 modifications for easy wire connection to transmitters. Terminal head can be equipped with standard or special-purpose cable gland. For further details see "Alternative designs & Ordering information" below.

Technical characteristics

Hot junction

one

Ungrounded or Grounded

two

Vibration resistance GOST R 52931

group V3

Seismic resistance MSK-64

grade 9 for unit installation up to 70 m above zero mark

Nominal (rated) pressure

6.3 MPa

01.08 modification

0.1 MPa

01.06, 01.16 modifications

Climatic category GOST 15150

UHL2Ambient temperature:

-60..+120ºС for general purpose products

-60..+85 ºС for Ex version with analogous signal

-55..+85ºС for products with unified output signal

Calibration

- MI 3090-2007 – for assembled sensor, with fitting length 20 - 250 mm, without measuring transmitters;
- MI 3091-2007 – for 21.ХХ modification sensors
- GOST 8.338-2001 – for sensor fitting length larger than 250 mm, without measuring transmitters;
- MP RT 2026-2013 – for sensors with installed measuring transmitters.

Reliability indicators

Group of operating conditions

Probability of
failure-free operation

Specified lifetime

Mean
lifetime

Guarantee
conditions

I

0.95 for 40 000 hours

5 years

10 years

5 years

II

0.95 for 16 000 hours

2 years

4 years

2 years

III

0.95 for 8 000 hours

1 year

2 years

1 year

IV

Not rated

Not rated

Not rated

Not rated

Error limits

Measurement accuracy of sensors with 4-20 mА DC signal and/or digital signal via HART protocol are given taking into account accuracies of thermocouple itself, transmitter and transmitter's cold junction compensation.


Output signal

Symbol

Measurement accuracy

Output
signal

Symbol

Measurement accuracy

4-20mА

c0Т40

±0,4% ∙tn* or ±1,5°С

4-20mА+HART

c1N25

±0,25%∙ tn or ±0,9°С;

c1Т50

±0,5%∙ tn or ±2,0°С

c0N40

±0,4%∙ tn or ±1,2°С;

c2Т80

±0,8%∙ tn or ±2,5°С;

c1N50

±0,5%∙ tn or ±1,7°С;

 

 

c2N80

±0,8%∙ tn or ±2,5°С;

* - tn sensor adjustment range should be multiplied by specified value in %. Select higher value.

Temperature range

CT type

Thermowell diameter

Thermowell material

Group of operating conditions

Application
temperature, ºС

Calibration interval

Mean lifetime

CTN
CTK

16; 20

S10

I

-40…+600

5 years

10 years

II

-200…+800

2 years

4 years

CTK

20

S13

I

-40…+600

5 years

10 years

II

-200…+900

2 years

4 years

CTN

20

S13

I

-40…+800

5 years

10 years

II

-200…+900

2 years

4 years

CTK

20

T310

I

-40…+600

5 years

10 years

II

-200…+900

2 years

4 years

III

-200…+1100

1 year

2 years

CTN

20

T310, Т45

I

-40…+800

5 years

10 years

II

-200…+1100

2 years

4 years

Т310

IV

-200…+1150

Not rated

Not rated

20

Т45

IV

- 200…+ 1250

Not rated

Not rated

CTK

20

Т45

III

-200…+1100

1 year

2 years

IV

- 200…+ 1250

Not rated

Not rated

CTN

27

Tarm

II

-200…+1100

2 years

4 years

CTK

III

-200…+1100

1 year

2 years

CTK, CTN

IV

- 200…+ 1300

Not rated

Not rated

CTL

16; 20

S10
S13

I

-40…+600

5 years

10 years

II

-100…+800

2 years

4 years

CTJ

16; 20

S10; S13

II

-40…+760

2 years

4 years

Response time τ 0,63:


Hot junction

Sensor response time depending on diameter, s

Modifications: 01.06(U); 01.16(U); 01.08;

Modifications: 01.12,    01.13

d = 14

d = 16

d = 20

d = 5

d = 7

Insulated from sheath

30

40

50

5

7

Uninsulated from sheath

3

5

Execution options

CTK

 

Exi

01.08

0

21

c1

H50

U

 

S10

20

L

/

l

 

 

1

 

2

3

 

4

5

 

6

7

 

8

9

 

10

 

11

 

12

 

13

 

14

 

NN

Name

Code

Description

1

Sensor type

CTK, CTL, CTN, CTJ, CTM

Mineral insulated cable thermocouple with type according to IEC 60584 and ASTM E230

2

Explosion protection

Not filled

general purpose electrical equipment

Exi

0ExiaIICT6 X, intrinsically safe circuit

Exd

1ExdIICT6, explosion-proof enclosure

3

Modification

01.06;21.06; 01.06A

without mounting elements, and angled (A)

01.08; 21.08

with welded fitting

01.16; 21.16; 01.16A

with assembled cover without mounting elements, and angled (A)

4

Cable gland

0

standard cable gland

Not permitted for 1ExdIICT6

А

for unarmoured cable in metal hose RZCH-15

В

for unarmoured cable in metal hose MRPI-15

C

for unarmoured cable in metal hose DN18

D

for unarmoured cable in metal hose DN20

E

for unarmoured cable in metal hose DN12

F

for pipe assembly, М20х1,5 internal thread

G

for pipe assembly, output external thread G1/2

H

for unarmoured cable, 6.5 - 14 mm diameter

I

for unarmoured cable, 3.2 - 8.7 mm diameter

J

for cable with internal/external sheath diameter: 6,1-11,7/9,5-15,9, single-line wire armoured cable

К

for cable with internal/external sheath diameter: 3,1-8.7/6,1-11,5, all armour types

L

for cable with internal/external sheath diameter: 6,5-14/12,5-20,9, all armour types

5

Sensor terminal
head (see "Alternative designs" table, pages 1-10)

10

plastic head

IP55

general purpose

15; 16;17; 18; 19

aluminium head

IP66/IP68

1ExdIICT6 / 0ExiaIICT6 X

20; 22

aluminium head

IP65

general purpose

14; 21; 23; 24; 25; 26; 28; 29

aluminium head

IP66

0ExiaIICT6 Х or general purpose

27

stainless steel

IP66

0ExiaIICT6 Х or general purpose

6

Tolerance class

c0;   c1;   c2

For further details see table 5 page 2-9

7

Output signal, transmitter accuracy symbol, see table 5, page 2-10

Not filled

analogous signal (mV) according to NSC

Т40

For terminal heads >14

4-20 mА

for c0

Т50;  Т70

for c1

Т80;  Т100

for c2

H25

4-20 mА +HART

Individual sensor calibration (c1)

H40

for c0

H50

for c1

H80

for c2

8

Hot junction
design

G

grounded junction,

general purpose

U

ungrounded junction,

1ExdIICT6 / 0ExiaIICT6 X / general purpose

9

Number of wire couple

Not filled

1 wire couple

2

2 wire couples (2 junctions)

10

Reinforcement material

S10

steel 12Cr18Ni10T

S13

steel 10Cr17Ni3M2T

Т310

AISI 310

Т45

alloy CrNi45U

Tart

АРМ Kanthal alloy

11

Outer diameter

14; 16; 20

size (mm) on Customer's choice

12

Probe length

50÷3150

probe length L to the working end, mm

13

Extension neck length l

Not filled

if equal to 120 mm or there are no mounting elements

30÷500

specify dimension in mm, oif 120 mm doesn't fit

14

Fitting standard size

Not filled

if  threaded fitting M33x2 or no fitting is used

Specify thread size

in other cases