Technical Guide


Thermocouple Type

Type Former Symbol Composing materials
K CA

(+)  : Chromel

(-)  : Alumel

E CRC

(+)  : Chromel

(-)  : Constantan

J IC

(+)  : Iron

(-)  :  Constantan

T CC

(+)  :  Copper

(-)  :  Constantan

R (PR)

(+)  :  Platinum / 13% Phodium

(-)  :  Pure Platinum

Standard ANRITSU Meter products are designed to use Type-K or Type-E thermocouples. Please note that the main thermometer unit must be connected to a probe of the designed type for accurate temperature measurements. ANRITSU can also produce certain models for use with Type-J or Type-T thermocouples.

Connection

Standard ANRITSU meter products are designed to use either the ASP or ANP plug. Please note that the main thermometer unit and probe must have the same connector types. ANRITSU can also produce certain probe models with the following connector types.

*WA, WC, and WT are made of generally available electrical materials.
Note that temperature changes in these parts may result in measurement errors.

Cable Type

For information on standard probe compensating lead wires ( cords ), please refer to the probe pages.

ANRITSU can also produce certain probe models with the following compensating lead wires.

Type :  K / E

Model

Outer diameter

Conductor

Sheath

Material

Heat

Resistance

Resistance Feature
TS-K / E
φ2.3mm 7 / 0.1 × 2

Slicone

rubber

240°C

K: 18Ω / m

E: 22Ω / m

Thin, Flexible
TF-K / E
φ2.3mm 7 / 0.1 × 2
Teflon
230°C

K: 19Ω / m

E: 22Ω / m

Resistant to

chemicals

TC-K / E
φ4.0mm 14 / 0.1 × 2

Silocone

rubber

240°C

K: 9Ω / m

E: 11Ω / m

Flexible
TCG-K / E
φ4.5mm 14 / 0.1 × 2

Silicone

rubber with

Stainless

Steel

240°C

K: 9Ω / m

E: 11Ω / m

Flexible, Resistant

to external damage

GW-K / E
φ2.3mm 7 / 0.32 × 2
Glass fiber
300°C

K: 11Ω / m

E: 14Ω / m

Highly resistance

to heat

SG-K / E
φ3.0mm 7 / 0.65 × 2

Glass fiber

with Stainless

Steel

400°C

K: 3Ω / m

E: 3.6Ω / m

Moderate hardness

Highly resistnace to heat

Resistant to external damage

TPC-K / E
φ3.3mm 14 / 0.1 × 2
Polyurethane
110°C

K: 18Ω / m

E: 22Ω / m

Coiled cord contraction / 

extension range :

0.3 to 1.5m

*[14/0.1×2] in the conductor column indicates that the cord contains two conductor wires (one pair).
Each conductor wire is twisted and composed of 14 0.1-mm-diameter wire strands.

Tolerance

The thermocouples used in ANRITSU Meter products comply with the Class 2 tolerance standards specified within the Japanese Industrial Standard JIS C1602-1995. However, since the structure of probes and other factors can affect the tolerance of specific temperature measuring probes, please refer to the pertinent pages for information on the precision of specific probes

Thermocouple Tolerance

Type

Measureing Temperature

Tolerance
K

at 333 to 1200°C

at -40 to 333°C

±0.75% of measured temperature

±2.5°C

 E

at 333 to 900°C

at -40 to 333°C

 ±0.75% of measured temperature

±2.5°C


Probe tolerance measuring conditions

Specification

indicated in catalog

At 100°C Surface
At 100°C
Test temperature

100°C

100°C

Probe application

Stationary surface probes

Moving / rotating surface probes

Internal probes

Air / gas probes

 Test method

Measurement of stationary metal

surface temperatures

Measurement of boiling water by immersion
Measurement of steam temperatures 

The tolerance of surface probes can vary significantly depending on measuring conditions, measurement target, and the nature of the contact between the probe and measurement target. When using a probe, make sure the sensor head correctly contacts target surface.

Response time

The response time given for our temperature measuring probes is the time required to detect 99% of the true value.

Probe response time measuring conditions

Probe application
Test method

Stationay Surface Probes

Moving / Rotatin Surface Probes

Measurement of stationary metal

surface temperature

Internal Probes

Measurement of boiling water

by immersion

 Air / Gas Probes Measurement of steam temperature 


Response curve

ex) Stationary Surface Probes : N-213K

ex) Internal Probes : BS-21K


Durability

The probe product pages use the following symbols to indicate probe durability. Please note that probe durability can vary significantly depending on actual conditions of use.

Durability

Rank

Staitionary Surface

Temperature Probes

Moving / Rotating

Surface Temperature

Probes

Liquid or Gas

Temperature

Probes

A

More than 50,000

contacts

More than 1500 hours

cotinuously

Long lived

(indefinable)

B

More than 10,000

contacts

More than 1,000 hours

continuosly

over 1 year
C

More than 5,000

contacts

More than 500 hours

continuously

over 6 months
D

Less than 5,000

contacts

Less than 500 hours

continuously

Less than

6 months

S

unavailable

due to special appcilation

unavailable

due to special appcilation

 


Stationary Surface Temperature probes

Number of contacts enabling measurement within the accuracy range on a flat and smooth metal surface at a temperature of 300°C(or at the operating temperature limit if the operating temperature limit is below 300°C).

Moving / Rotating Surface Temperature probes

Time period in which measurement was achieved within the accuracy range, on a flat and smooth metal surface moving at a rate of 200 m/min.

Liquid or Gas Temperature probes

When used correctly, virtually no deterioration occurs in these products due to temperature measuring operations. Therefore, the durability ranking is based on the ease with which impact results in damage.

Operating temperature limit

The operating temperature limit is determined by the allowable temperature limit of the sensor head contacts the measurement target. Please note that the operating temperature limit is not the same as the allowable temperature limits of the grip, cord, and plug. Probes are more easily damaged at the temperature of below 0°C, due to frost adhesion, reduced elasticity constant, and other factors.

About products made of polymide

Some ANRITSU products are made of polyimide. Since polyimide may adversely affect humans, avoid using such products in applications where they may come into contact with foods, internal organs, or bodily fluids.