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01.25

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01.25

01.19 temperature sensors are designed for temperature measurement in melt aluminium and non-ferrous metals, and also in barium chloride bath.
For melt aluminium and non-ferrous metals temperature measurement it is recommended to use thermocouples with thermowell made of cast iron Ci or silicon nitride ceramic; for barium chloride temperature measurements - thermocouples with thermowell made of 12Cr18Ni10T steel.
Straight thermocouple can be dismantled, thermowell can be replaced in operation. Cable temperature-sensing element is partially armoured with steel tube. Temperature in connection point of thermowell and fitting should not exceed 800°С.
Thermocouple service life is not rated and is determined by thermowell destruction speed in medium being measured.
According to operating data from various plants, thermowell service life is:
- 8 to 12 months for thermowell made of silicon nitride ceramic and being used in melt aluminium;
- 10 to 30 days for thermowell made of cast iron and being used in melt aluminium;
- 10 to 30 days for thermowell made of 12Cr18Ni10T steel and being used in barium chloride bath. 
Thermocouple immersion length should not exceed 80% thermowell length (thermowell).
01.25 temperature sensors are designed for temperature measurement in liquid and gaseous media, that are corrosive for thermowell material. These sensors can be dismantled, and consist of cable temperature-sensing element (can be supplied separately) and heat-resistant thermowell.
Assembly thermowell is equipped with solid tip with inner bore for temperature-sensing element. Tip is made of heat-resistant alloy or heat-resistant steel. 01.25 sensor service life depends on tip corrosion speed due to chemical and thermal effect of medium being measured. Reliability values stated below are given assuming that corrosion depth for the specified lifetime does not exceed 2mm.
Two 01.25 thermowell parts are welded together by argon-arc welding. Temperature at welding point during operation should not exceed 800°С.
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, two

Ungrounded

Vibration resistance GOST R 52931

group N2

01.19 modification

group V3

01.25 modification

Nominal (rated)
pressure

0.1 MPa

01.19 modification

6.3 MPa

01.25 modification

Seismic resistance MSK-64

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

Climatic category GOST 15150

UHL2Ambient temperature:

-60..+120ºС for general purpose products

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

Calibration

Only initial during production, are not subject to periodic calibration
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

Modification

Thermowell diameter

Thermowell material

Group of
operating
conditions

Application
temperature, ºС

Calibration
interval

Mean lifetime

CTK CTN

01.19

40, 60

S10

IV

-40…+1250

Not
rated

Not
rated

28

C101

40

GI

01.25

14÷30

Т45

-40…+1250

Т310

-40…+1150

CTN

Т45,Т310

I

-40…+800

5 years

10 years

II

-40…+1100

2 years

4 years

CTK

Т18, Т00,Т310

I

-40…+600

5 years

10 years

Т18, Т00

II

-40…+900

2 years

4 years

Т18, Т00

III

-40…+1000

1 year

2 years

Т310

-40…+1100

 

Response
time τ 0,63

70 s

S10, GI diameter 40mm

01.19 modification

90 s

C101 diameter 28

01.19 modification

50 s

Т45, Т00, Т18, Т310 diameter 20mm

01.25 modification
Execution options

CTK

 

 

01.19

—

0

20

—

c1

 

—

U

 

—

GI

—

40

—

L

/

lthermowell

—

lbend

1

 

2

3

 

4

5

 

6

7

 

8

9

 

10

 

11

 

12

 

13

 

14

 

NN

Name

Code

Description

1

Sensor type

CTK, CTL, CTN

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

2

Explosion protection

Not filled

general purpose electrical equipment

3

Modification

01.19

thick-walled thermowell, straight, without fitting

01.19A

thick-walled thermowell, angle, without fitting

01.25

thick-walled thermowell, straight, with screw-in fitting

4

Cable gland

0

standard cable gland of terminal head

А-Z

Special cable gland (see table 3 page 1-13)

5

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

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

0ExiaIICT6Х or general purpose

27

stainless steel

IP66

0ExiaIICT6Х or general purpose

6

Tolerance class

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 according to NSC

Т40

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

Sensor 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

Safety fitting
material

S10

steel 12Cr18Ni10T

D=40, 60 mm

lthermowell≤2000 mm

GI

Grey Iron

D=40 mm

lthermowell≤2000 mm

C101

Silicon nitride ceramics

D=28

lthermowell≤1365 mm

Т18

steel 10Cr23Ni18

10÷40

lthermowell≤1300 mm

Т45

alloy CrNi45U

Т00

alloy 15Cr25Т

11

Outer diameter, D

14, 16, 20, 25

size (mm) on Customer's choice

01.25

40; 28

01.19

12

Probe length, L

450÷3150

probe length L to the working end, mm

13

Size of lthermowell

250÷2000

specify dimensions in mm

01.19, 01.19U

Extension neck length

80-500

specify dimensions in mm

01.25

14

Additional information

Not filled

 

01.19

Size of lbend

300÷2000

dimensions in mm

for 01.19U

Fitting standard size

Not filled

without welded fitting

for 01.25

М33, М27, М20, C1, C3/4

М33х2, М27х2, C1”, C3/4”
Examples of product designation

CTK Exi01.25-A23 - c1H50 - U - Т18 - 20 - 500/ 160-М33 – chromel-alumel temperature sensor, explosion protection 0ExiaIICT6Х , structural modification 01.25 with terminal head made of aluminium alloy (023), primary thermocouple tolerance class 1, 4-20mА DC output signal via HART protocol (H50), ungrounded junction (U), thermowell made of heat-resistant steel 10Cr23Ni18 (Т18), diameter 20 mm, 500 mm insertion length (solid end length), 200 mm length from fitting to terminal head, fitting thread М33х2.

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