STANDARD TEMPERATURE SENSORS■STANDARD PLATINUM RESISTANCE THERMOMETERS■STANDARD PLATINUM-COBALT RESISTANCE THERMOMETERFOR CRYOGENIC TEMPERATURE
These are standard temperature sensors conforming
to the International Temperature Scale of 1990.
The temperature range from 4 K to 962ºC is measured
by these sensors which are classified into a standard
platinum-cobalt resistance thermometer for cryogenic
temperature,
standard
platinum
resistancethermometers for low temperature, medium
temperature and high temperature.
The R800 series standard platinum resistancethermometers, which have been commercialized
under the guidance of the National Metrology Instituteof Japan (NMIJ), have been adopted by national
metrology institute in overseas countries with
reputation on their performance and reliability.
MODEL R800-0■FEATURES●These sensors are manufactured with selected quality
materials by highly skilled manufacturing techniques under
the guidance of NMIJ.
●The standard platinum resistance thermometer for low
temperature is the first international product in Japan as thestandard thermometer applicable to 13 K.
●The standard platinum resistance thermometers for
medium temperature and for high temperature have beendelivered to national measurement institute in overseas
countries in large quantities. Its performance has beenhighly reputed in Comite Consultatif de Thermometrie (CCT).

MODEL R800-2●The standard platinum-cobalt resistance thermometer forcryogenic temperature features excellent reproducibility andstability in a cryogenic temperature range below to 4 K.

■LIST OF STANDARD TEMPERATURE SENSORSSTANDARD PLATINUM-COBALT RESISTANCE THERMOMETER FOR CRYOGENIC TEMPERATURE

MODEL R800-4
STANDARDTEMPERATURESENSORS

STANDARD PLATINUMRESISTANCE THERMOMETERS
R800 series

STANDARD PLATINUM RESISTANCE THERMOMETER FOR LOW TEMPERATURE

MODEL R800-0

STANDARD PLATINUM RESISTANCE THERMOMETER FOR MEDIUM TEMPERATURE MODEL R800-2
STANDARD PLATINUM RESISTANCE THERMOMETER FOR HIGH TEMPERATURE

MODEL R800-3

LOW RESISTANCE TYPE STANDARD PLATINUM RESISTANCE THERMOMETER FOR HIGH TEMPERATURE

MODEL R800-3T

PSE-253C■CALIBRATIONSTANDARD PLATINUM RESISTANCETHERMOMETER FOR LOW TEMPERATURE(CAPSULE TYPE)

For applying this thermometer as a standard temperature sensor, thetemperature-resistance value table must be prepared by calibrating it.
CHINO will prepare a temperature-resistance value table if requested.
(Calibration charge is separately asked.)

MODEL R800-0●CALIBRATION TESTMODEL R800-0

CALIBRATION POINT: Triple point of water(273.16 K)
Equivalent to triple point of mercury(234.3156 K)* Equivalent to triple point of argon(83.8058 K)* Equivalent to triple point of oxygen(54.3584 K)* Equivalent to triple point of neon
(24.5561 K)* Equivalent to boiling point of equilibrium hydrogen(20.2711 K)* Equivalent to 17.035 K point of equilibrium hydrogen (17.035 K)* Equivalent to triple point of equilibrium hydrogen(13.8033 K)
CALIBRATION UNCERTAINTY : 0.1 K* By comparison calibration

This thermometer is designed as a capsule type standard
temperature sensor covering the temperature range from 13.8033 K(-259.3467 ºC triple point of equilibrium hydrogen) to 30 ºC.

■FEATURES●Conforms to the specifications of ITS-90 (International
Temperature Scale of 1990)●The adoption of the strain-free double coil system structure in asensing part and CHINO’s unique manufacturing techniques haverealized excellent reproducibility and stability of the thermometer
for a long time.

●TEMPERATURE-RESISTANCE VALUE TABLE
The temperature-resistance value table will be prepared byinterpolating scales at intervals of 1 K between 13 K and 0 ºC
according to the calibrated values in the calibration test.

■GENERAL SPECIFICATIONS■EXTERNAL DIMENSIONS

φ5

0
± 0.1

φ7

±1

MEASURING TEMPERATURE RANGE: 13 K to 30 ºC
RESISTANCE VALUE: 25.5 ± 1 Ω (at 0 ºC)
SPECIFIED CURRENT: 1 mATEMPERATURE CHARACTERISTIC: R (-38.8344 ºC) / R (0.01 ºC) ≦ 0.844235
SENSITIVITY : 0.1 Ω / K
SELF-HEATING : Approx. 1 mK / 1 mA
SEALED GAS : Helium gas
CONNECTING LEAD WIRE
: 4-conductor type platinum wire Ø 0.3 mm X 40 mm
FRAME: Cross quartz
PROTECTING TUBE
: Capsule type platinum sheath Ø 5 mm X 43 mm

43

±1

12

±2

40

±1

Unit : mm*The lead wire section size may change more or less.

■CONSTRUCTION
An element made by winding a platinum resistance wire onto a crossquartz frame by the double coil system is accommodated a platinumsheathed capsule, and connecting lead wires are led through themetal glass sealing.

GLASS SEAL

PLATINUM RESISTANCE WIRE
PLATINUM LEAD WIRE

2

■CALIBRATIONSTANDARD PLATINUM RESISTANCETHERMOMETER FOR MEDIUMTEMPERATURE (LONG STEM TYPE)

For applying this thermometer as a standard temperature sensor, thetemperature-resistance value table must be prepared by calibrating it.
CHINO will prepare the temperature-resistance value table if
requested. (Calibration charge is separately asked.)

MODEL R800-2●CALIBRATION TESTMODEL R800-2

CALIBRATION POINT: Freezing point of aluminum
Freezing point of zincFreezing point of tin
Triple point of water
CALIBRATION UNCERTAINTY : 0.01 K

This thermometer is designed as a long stem type standard
temperature sensor with a quartz protecting tube covering thetemperature range from 73 K (-200.15 ºC) to 933.473 K (660.323 ºC,
freezing point of aluminum).

(660.323 ºC)(419.527 ºC)(231.928 ºC)(0.0 l ºC)●TEMPERATURE-RESISTANCE VALUE TABLE■FEATURES

The temperature-resistance value table will be prepared byinterpolating the R (t) values between 0 ºC and 661 ºC at intervals of
1 K according to the calibrated values in the calibration test.

●Conforms to the specifications of ITS-90 (International
Temperature Scale of 1990).
●The adoption of the strain-free double coil system structure in asensing part and CHINO’s unique manufacturing techniques haverealized excellent reproducibility and stability of the thermometer
for a long time.
●The unique structure including a convection preventive plate and adelustered surface finish protecting tube have reduced an error
caused by thermal radiation, thermal conduction, and others.

MEASURING TEMPERATURE RANGE: 73 K to 661 ºC
RESISTANCE VALUE: 25.5 Ω ± 1 Ω (at 0 ºC)
SPECIFIED CURRENT: 1 mATEMPERATURE CHARACTERISTIC: R (29.7646 ºC) / R (0.01 ºC) ≧1.11807
SENSITIVITY : 0.1 Ω / K
SELF-HEATING : Approx. 2 mK / 1 mA
SEALED GAS : Mixture gas (argon and oxygen)
CONNECTING INTERNAL LEAD WIRE
: Platinum wire
CONNECTING EXTERNAL LEAD WIRE
: 4-conductor cabtyre cord 2 m with gold-plated
terminals
FRAME: Cross quartz
PROTECTING TUBE
: Delustered quartz tube (Ø7.0 ± 0.5) mm X 600 mm

TERMINAL(Gold-plated)

An element made by winding a platinum resistance standard onto across quartz frame by the double coil system is accommodated into aquartz tube. The interior of the protecting tube is composed of theelement, convection preventive plate, spacer, internal lead wire, etc.,
and 4-conductor external leads have gold-plated terminals.
INTERNAL
PLATINUM
LEAD WIRE

CONVECTIONPREVENTIVEPLATETERMINAL BOX(Bakelite)

1900

100

■CONSTRUCTIONCROSS FRAME

90
PROTECTING SPRINGPROTECTING TUBE
(Quartz glass)■GENERAL SPECIFICATIONSPLATINUM RESISTANCE WIRE

600

φ7.0

±0.5

■EXTERNAL DIMENSIONSPROTECTING
TUBE

3LEAD WIRE

Unit : mm

STANDARD PLATINUM RESISTANCETHERMOMETER FOR HIGHTEMPERATURE (LONG STEM TYPE)

LOW RESISTANCE TYPESTANDARD PLATINUM RESISTANCETHERMOMETER FOR HIGHTEMPERATURE (LONG STEM TYPE)

MODEL R800-3
MODEL R800-3T

MODEL R800-3This thermometer using a high purity platinum wire with a large
diameter as a temperature sensing wire is designed as a stem type
standard temperature sensor covering the temperature from 273.15
K (0 ºC) to 1234.93K (961.78 ºC, freezing point of silver).

MODEL R800-3T
This thermometer using a high purity platinum wire with a large
diameter as a temperature sensing wire is designed as a stem type
standard temperature sensor covering the temperature range from273.15 K (0 ºC) to 1234.93 K (961.78 ºC, freezing point of silver).

■FEATURES●Conforms to the specifications of ITS-90 (International
Temperature Scale of 1990).
●The adoption of the strain-free double coil system structure in asensing part and CHINO’s unique manufacturing processing
techniques have realized excellent reproducibility and stability ofthe thermometer for a long time.
●A long quartz protecting tube is suitable for high-temperature
measurement.

■FEATURES■GENERAL SPECIFICATIONS■GENERAL SPECIFICATIONSMEASURING TEMPERATURE RANGE: 0 ºC to 962 ºC
RESISTANCE VALUE: 2.55 Ω ± 0.1 Ω (at 0 ºC)
SPECIFIED CURRENT: 1 mATEMPERATURE CHARACTERISTIC: R (29.7646 ºC) / R (0.01 ºC) ≧ 1.11807 andR (961.78 ºC) / R (0.01 ºC) ≧ 4.2844
SENSITIVITY : 0.01 Ω / K
SELF-HEATING : Approx. 0.2 mK / 1 mA
SEALED GAS : Mixture gas (argon and oxygen)
CONNECTING INTERNAL LEAD WIRE
: Platinum lead wire
CONNECTING EXTERNAL LEAD WIRE
: 4-conductor cabtyre cord 2 m with gold-plated
FRAME: Cross quartz
PROTECTING TUBE
: Delustered quartz tube
(Ø7.0 ± 0.5) mm X 700 mm

MEASURING TEMPERATURE RANGE: 0 ºC to 962 ºC
RESISTANCE VALUE: 0.25 Ω (at 0 ºC)
SPECIFIED CURRENT: 10 mA
TEMPERATURE CHARACTERISTIC: R (29.7646 ºC) / R (0.01 ºC) ≧ 1.11807 andR (961.78 ºC) / R (0.01 ºC) ≧ 4.2844
SENSITIVITY : 1 mΩ / K
SELF-HEATING : Approx. 0.02 mK / 1 mA
SEALED GAS : Mixture gas (argon and oxygen)
CONNECTING INTERNAL LEAD WIRE
: Platinum lead wire
CONNECTING EXTERNAL LEAD WIRE
: 4-conductor cabtyre cord 2 m with gold-plated
FRAME: Cross quartz
PROTECTING TUBE
: Delustered quartz tube
(Ø7.0 ± 0.5) mm X 700 mm●Conforms to the specifications of ITS-90 (International
Temperature Scale of 1990).
●Improved the sensing part of former R800-3L and the stability andrepeatability becomes even better. (Evaluation tested at NMIJ).
●As a low resistance type platinum wire being suitable for hightemperature measurement is used, the influence of insulation
resistance is very low.

■CALIBRATION
For applying this thermometer as a standard temperature sensor, thetemperature-resistance value table must be prepared by calibrating it.
CHINO will prepare the temperature-resistance value table if
requested. (Calibration charge is separately asked.)■CALIBRATION
For applying this sensor as a standard thermometer, thetemperature-resistance value table must be prepared by calibrating
it. CHINO will prepare the temperature-resistance value table at
CHlNO’s standard laboratory if requested. (Calibration charge isseparately asked.)●CALIBRATION TESTCALIBRATION POINT: Freezing point of silver
Freezing point of aluminum
Freezing point of zincFreezing point of tin
Triple point of water
CALIBRATION UNCERTAINTY: Triple point of water, tin point, zinc point: 0.01 ºC
Aluminum point: 0.02 ºC, silver point: 0.03 ºC●CALIBRATION TESTCALIBRATION POINT: Freezing point of silver
Freezing point of aluminum
Freezing point of zincFreezing point of tin
Triple point of water
CALIBRATION UNCERTAINTY: Triple point of water, tin point, zinc point: 0.01 ºC
Aluminum point: 0.02 ºC, silver point: 0.03 ºC(961.78 ºC)(660.323 ºC)(419.527 ºC)(231.928 ºC)(0.01 ºC)

(961.78 ºC)(660.323 ºC)(419.527 ºC)(231.928 ºC)(0.01 ºC)

●SILVER POINT CALIBRATION TEST
2 points calibration of freezing point of silver and triple point of wateris also provided.

●TEMPERATURE-RESISTANCE VALUE TABLE
The temperature-resistance value table will be prepared byinterpolating the R (t) values between 660 ºC and 962 ºC atintervals of 1 K according to the calibrated values in the●TEMPERATURE-RESISTANCE VALUE TABLE
The temperature-resistance value table will be prepared byinterpolating the R (t) values between 0 ºC and 962 ºC at intervals of
1 K according to the calibrated values in the calibration test.

4

■CONSTRUCTION (R800-3)■CONSTRUCTION (R800-3T)

An element made by winding a platinum resistance standard onto across quartz frame by the double coil system is accommodated into aquartz tube. The interior of the protecting tube is composed of theelement, convection preventive plate, spacer, internal lead wire, etc.,
and 4-conductor external leads have gold-plated terminals.

An element made by winding a platinum resistance strarnd onto across quartz frame by the single coil system is accommodated into aquartz tube.
The interior of the protecting tube is composed of the element,
convection protective plate, spacer, internal lead wire, etc. and 4conductor external leads have gold-plated terminals.

INTERNAL
PLATINUM
LEAD WIRE■EXTERNAL DIMENSIONS±0.5

PLATINUM RESISTANCE WIRE

90

700

φ7.0

PROTECTING SPRINGCROSS FRAME
CONVECTIONPREVENTIVE
PLATE

PROTECTING TUBE
(Quartz glass)

PROTECTINGTUBE

TERMINAL BOX(Bakelite)

1900

100

LEAD WIRETERMINAL(Gold-plated)

Unit : mm

MODEL R800-4■CONSTRUCTIONSTANDARD PLATINUM-COBALT RESISTANCETHERMOMETER FOR CRYOGENICTEMPERATURE (CAPSULE TYPE)

An element made by winding a platinum-cobalt resistance wire ontoa cross quartz frame by the double coil system is accommodated
into a platinum-sheathed capsule, and connecting lead wires are led
through the metal glass sealing.

MODEL R800-4

GLASS SEALMODEL R800-4This thermometer is designed as a standard temperature sensor
covering from 4 K to 13 K. It adopts platinum-cobalt rarefied alloy asa temperature sensing wire.
The platinum-cobalt rarefied alloy is made by alloying precious metal
platinum with infinitesimal magnetic element cobalt, and it features aconsiderably high resistance and sensitivity in a cryogenic
temperature range, as compared with pure metals. A platinum-cobalt
resistance thermometer (Model R800-7) for industrial use isprepared, too.

PLATINUM-COBALT RESISTANCE WIRE
PLATINUM LEAD WIRE

■FEATURES■CALIBRATION●A single sensor covers temperature range from 4 K to 0 ºC
●Stable sensitivity (resistance change ratio).
●Double coil type temperature sensing structure features very
excellent reproducibility of the thermometer.
●Excellent responsibility owing to sealed helium gas.

For applying this sensor as a standard thermometer, the temperatureresistance value table must be prepared by calibrating it. CHINO will
prepare the temperature-resistance value table if requested.
(Calibration charge is separately asked.)
CALIBRATION TEMPERATURE: 4 K to 0 ºC or 14 K to 0 ºC

■GENERAL SPECIFICATIONSMEASURING TEMPERATURE RANGE
4 K to 0 ºC
TEMPERATURE SENSING ELEMENT: Platinum-cobalt rarefied alloy (Pt-0.5 mol%Co)
RESISTANCE VALUE: 100 Ω ± 4 Ω (at 0 ºC)
MEASURING CURRENT: 1 mASENSITIVITY : Min. 0.09 Ω / K (at 12 K)
Max. 0.4 Ω / K
SELF-HEATING : Approx. 2 mK / 1 mA in LN2SEALED GAS : Helium gas
LEAD WIRE: 4-conductor platinum wire Ø 0.3 mm X 40 mm
FRAME: Cross quartz
PROTECTING TUBE
: Capsule type platinum sheath Ø 5 mm X 43 mm

φ5

φ7

0
± 0.1

±1

■EXTERNAL DIMENSIONS

43

±1

12

±2

40

±1

Unit : mm*The lead wire section size may change more or less.

5

REFERENCES■STANDARD TEMPERATURE SENSORSDEFINING FIXED POINTS (ITS-90)

54.3584 K● TRIPLE POINT OF OXYGEN
24.5561 K
TRIPLE POINT
OF NEON ● 83.8058K●
TRIPLE POINT OF ARGON
20.2711 K
VAPOR PRESSURE POINT OF EQUILIBRIUM HYDROGEN● 234.3156 K●
TRIPLE POINT OF MERCURY
17.035 K
VAPOR PRESSURE POINT OF● EQUILIBRIUM HYDROGEN

TEMP.
（℃）

13.8033 K
TRIPLE POINT
231.928 ℃● OF EQUILIBRIUM
FREEZING
HYDROGEN
POINT
273.16 K
4.2221 K VAPOR
OF TIN● PRESSURE● 0.01 ℃●
TRIPLEPOINT
POINT
OF HELIUM
OF WATER

0−250

STANDARD TEMPERATURE SENSORS

R800-4
R800-02501084.62 ℃
FREEZING POINT OF COPPER●

419.52 7 ℃
FREEZING 660.323 ℃
FREEZING POINT
POINT
OF ZINC OF ALUMINUM
●
●

500

1064.18 ℃
FREEZING POINT OF GOLD●
961.78 ℃
FREEZING POINT OF SILVER
●

750

1000

1250

1500

Pt-Co RESISTANCE THERMOMETERCAPSULE TYPE Pt RESISTANCE THERMOMETERSTEM TYPE Pt RESISTANCE THERMOMETER

R800-2
R800-3, R800-3T

STEM TYPE Pt RESISTANCE THERMOMETER

C800-15, C800-35
B THERMOCOUPLESS AND R THERMOCOUPLES
C800-65

RADIATION THERMOMETERS

Specifications subject to change without notice. Printed in Japan (I) 2016. 11

32-8 KUMANO-CHO,ITABASHI-KU,TOKYO 173-8632
Telephone : +81-3-3956-2171
Facsimile : +81-3-3956-0915
E-mail : inter@chino.co.jp
Website : www.chino.co.jp/$