Temperature & Humidity
CALIBRATION FACILITY
MSIR INDIA’s Temperature and Humidity Metrology Laboratory operates at the pinnacle of ITS-90 thermal realization. Featuring primary sealed Triple Point of Water (TPW) cells, Gallium and Indium melting point standards, Standard Platinum Resistance Thermometers (SPRT), and two-pressure humidity generation systems, our laboratory delivers thermal validation with millikelvin precision.
TEMPERATURE RANGE
-196 °C to +1,600 °C
Liquid N2 to Furnaces
BEST UNCERTAINTY (CMC)
± 0.001 °C (1 mK)
At Water Triple Point
HUMIDITY RANGE
10 % to 98 % RH
Two-Pressure Generator
REFERENCE STANDARD
SPRT (ITS-90)
Fluke 1595A Super-Therm
Real-Time Thermal Wave & Fixed-Point Plateau Simulator
MEASURED TELEMETRY
0.010002
EXPANDED UNCERTAINTY (k=2)
±0.0008 °C
TRACEABILITY
NPL India
PARAMETER TUNING
Evaluated as per GUM (JCGM 100:2008) guidelines with complete Type A and Type B expanded uncertainty analysis.
Primary Reference Standards
Our temperature & humidity capabilities are anchored by primary standards directly calibrated by NPL India and BIPM-recognized National Metrology Institutes.
Isotech Sealed TPW Cells
Triple Point of Water Primary Standard
Primary realization of the kelvin (273.16 K / 0.010 °C) in high-purity quartz envelopes, establishing the baseline for SPRT resistance ratios (W).
Technical Highlights:
Fluke 1595A Super-Thermometer
Reference Thermometry Bridge
World-leading thermometry readout with 0.06 ppm ratio accuracy, automated current reversal, and zero-drift internal reference resistors.
Technical Highlights:
Thunder Scientific 2500
Two-Pressure Mobile Humidity Generator
Generates known humidity levels based on the NIST-proven two-pressure principle, requiring no secondary humidity sensors for master determination.
Technical Highlights:
Temperature & Humidity Scope Matrix (CMC)
Calibration & Measurement Capabilities (CMC) accredited under ISO/IEC 17025:2017. Uncertainties expressed at an expanded confidence level of approx. 95.45% (k=2).
| Discipline / Measurand | Calibration Range | Test Condition | Expanded CMC (±) | Master Reference Standard | Test Standard / Method |
|---|---|---|---|---|---|
| Resistance Thermometers (RTD / SPRT / Pt100) | -196 °C to +660 °C | Fixed Point & Fluid Bath | ± 0.003 °C to ± 0.025 °C | SPRT + Fluke 1595A Super-Thermometer | Comparison in stirred calibration bath (EURAMET cg-13) |
| Noble & Base Metal Thermocouples (K, J, T, N, R, S, B) | 0 °C to 1,200 °C | Dry-Well & Tube Furnace | ± 0.35 °C to ± 1.2 °C | Type S/R Standard Thermocouple + DMM | Furnace comparison metrology (ASTM E220) |
| Relative Humidity Transmitters & Data Loggers | 10 % RH to 95 % RH (at 20°C to 50°C) | Controlled Chamber | ± 0.6 % RH | Chilled Mirror Hygrometer + 2-Pressure Gen | Direct chamber comparison against chilled mirror |
| Infrared Thermometers & Thermal Imagers | 30 °C to 500 °C | Large Aperture Blackbody (ε = 0.995) | ± 0.65 °C to ± 1.5 °C | Cavity Blackbody Reference Radiator | Radiometric infrared calibration (EURAMET cg-20) |
Instruments Serviced & Calibrated
We calibrate all major industrial, pharmaceutical, aerospace, and research-grade instrumentation.
RTD & PRT Sensors
Pt100, Pt500, Pt1000 2/3/4-wire probes
Thermocouples (All Types)
Industrial mineral-insulated K, J, T, E, R, S, B
Chilled Mirror Hygrometers
Primary optical dew point instruments
Thermal Imaging Cameras
FLIR, Fluke, Testo infrared imagers
Climatic Chambers & Autoclaves
Multi-point temperature & humidity mapping
Glass & Dial Thermometers
ASTM laboratory liquid-in-glass standards
Climate & Environment
Designed for Zero Drift
Every measurement at MSIR INDIA is conducted under strictly monitored and auditable environmental controls adhering to ISO/IEC 17025:2017:
UNBROKEN CHAIN OF TRACEABILITY (ISO/IEC 17025)
BIPM SI Thermodynamic Temperature Definition (Kelvin)
NPL India Primary ITS-90 Fixed-Point Sealed Cells
MSIR Master SPRT & 1595A Super-Thermometer (NABL CC-2891)
Client Industrial Probes, Furnaces, and Environmental Chambers
Book Temperature & Humidity Calibration
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INDICATIVE CALIBRATION FEE
₹ 3,000 + GST
Explore All 12 Metrology Laboratories
MSIR INDIA operates 12 specialized NABL-accredited metrology domains in Chennai.