Accredited Calibration Laboratory
Singapore's SAC-SINGLAS accredited ISO/IEC 17025 calibration lab. Traceable to national standards, recognised internationally — with a published accredited scope so you can see exactly what we cover, and to what range.
Senior calibration engineers with 20+ years across electrical, temperature, pressure & process instrumentation.
Accreditation LA-2023-0845-C, valid to 2 August 2027. Recognised internationally under ILAC MRA.
High-throughput lab handling large instrument fleets and batch calibration.
In-house laboratory calibration and on-site calibration to minimise your equipment downtime.
Electrical · Temperature · Humidity · Pressure
Our Calibration Services
Laboratory and on-site calibration across four accredited disciplines, plus temperature mapping — all to ISO/IEC 17025, traceable to international standards.
Electrical Calibration
Multimeters, clamp meters, insulation testers, power & harmonic analysers, and installation testers — calibrated across the full accredited electrical scope.
Temperature Calibration
Thermocouples, RTD/PRT probes, indicators, dry-block calibrators, liquid baths and thermal imagers — from -196 °C fixed points to 1000 °C enclosures.
Humidity Calibration
Humidity and temperature meters, hygrometers and RH transmitters — critical for pharmaceutical, food and cleanroom GMP compliance.
Pressure Calibration
Pneumatic and hydraulic pressure gauges, transducers, transmitters and documenting calibrators — up to 10,000 psi.
On-Site Calibration
Mobile team deployed to your facility for ovens, dry-wells, PRT/thermocouple sensors and pressure instruments — no transport risk, minimal downtime.
Temperature Mapping
Spatial mapping studies for cold rooms, warehouses, stability chambers and autoclaves, with full qualification documentation for audits.
Published for transparency
Our SAC-SINGLAS Accredited Scope
The exact parameters and ranges we are accredited to calibrate, under SAC-SINGLAS schedule LA-2023-0845-C. If your instrument sits inside these ranges, we can issue an accredited ISO/IEC 17025 certificate.
Electrical
26 parameters| Instrument / measured quantity | Accredited range |
|---|---|
| Resistance Measuring Instruments | 0 Ω – 1200 MΩ |
| DC Voltage Measuring Instruments | 0 mV – 1020 V |
| AC Voltage Measuring Instruments | 1 mV – 1020 V (3 Hz – 1 MHz) |
| DC Current Measuring Instruments | 0 µA – 30 A |
| DC Current Clamp Measuring Instruments | 0 mA – 1500 A |
| AC Current Measuring Instruments | 20 µA – 30.2 A (10 Hz – 30 kHz) |
| AC Current Clamp Measuring Instruments | 10 mA – 1500 A (30 Hz – 200 Hz) |
| Frequency Measuring Instruments | 0.01 Hz – 2 MHz |
| Capacitance Measuring Instruments | 0.2 nF – 120 mF |
| Inductance Measuring Instruments | 13 µH – 120 H |
| Resistance Sourcing Instruments | 0.01 Ω – 10 GΩ |
| DC Voltage Sourcing Instruments | 0 mV – 1000 V |
| AC Voltage Sourcing Instruments | 1 mV – 1000 V (3 Hz – 300 kHz) |
| DC Current Sourcing Instruments | 0 µA – 30 A |
| AC Current Sourcing Instruments | 10 µA – 30 A (3 Hz – 100 kHz) |
| Frequency Sourcing Instruments | 1 Hz – 100 MHz |
| Capacitance Sourcing Instruments | 0.1 nF – 100 mF |
| DC Power Measuring Instruments | 0.02 W – 1500 kW |
| AC Power Measuring Instruments | 0.02 W – 1500 kW |
| Low Resistance (Earth) Measuring Instruments | 100 mΩ – 10 kΩ |
| High Resistance (Insulation) Measuring Instruments | 10 kΩ – 999.9 GΩ |
| Ground Bond Resistance Measuring Instruments | 30 mΩ – 1.7 kΩ |
| Leakage Current Measuring Instruments | 0.1 mA – 30 mA |
| Residual Current Measuring Instruments | Trip Current: 3 mA – 3000 mA |
| Oscilloscope Calibration | Vertical, Horizontal & Bandwidth (50 kHz – 1100 MHz) |
| Stop Watch / Timer | 1 s – 10 800 s |
Temperature & Humidity
14 parameters| Instrument / measured quantity | Accredited range |
|---|---|
| RTD / PRT Sensor with Indicator | -80 °C – 660 °C |
| Thermocouple Wire with Indicator | -80 °C – 1000 °C |
| Temperature Indicator with Other Sensors | -80 °C – 660 °C |
| Fixed Point RTD Sensor | -196 °C, TPW, Gallium, Aluminium (660.3 °C) |
| RTD / PRT Sensor without Indicator | -95 °C – 660 °C |
| Thermocouple Wire without Indicator | -95 °C – 1000 °C |
| Connecting / C-J Thermocouple Wire | Type S, R, J, K, N, T, E (0 °C – 30 °C) |
| Thermocouple Indicator / Simulator | Types K, N, J, T, R, S, E (-250 °C – 1770 °C) |
| RTD & PRT Indicator / Simulator | PT385 (100 Ω), -200 °C – 800 °C |
| Dry Block Calibrator | -95 °C – 600 °C |
| Non-Contact (Infrared / Thermal Imager) | 5 °C – 500 °C |
| Humidity / Temperature Instruments | Temp 5 °C – 50 °C; Humidity 5 – 90 %RH |
| Temperature Enclosure (Freezers, Ovens, Furnaces) | -80 °C – 1000 °C |
| Liquid Bath | -80 °C – 270 °C |
Pressure
2 parameters| Instrument / measured quantity | Accredited range |
|---|---|
| Pneumatic Pressure Instruments | -13 psi – 1000 psi |
| Hydraulic Pressure Instruments | 0 psi – 10 000 psi |
Every accredited parameter and instrument type is also available as a traceable (non-accredited) calibration service, for jobs where accreditation isn’t required, or where ranges, models or site conditions fall outside the accredited scope.
Check before you send
Is my instrument in scope?
Type what you need calibrated — a multimeter, a PT100, a pressure gauge — and see instantly whether it falls under our SAC-SINGLAS accredited scope (LA-2023-0845-C), with the exact accredited range.
The document you receive
See exactly what you'll get
Every calibration comes with a clear, audit-ready certificate. Ours states the traceability chain, the standards used, and the measurement uncertainty for each result — everything an ISO 9001, GMP or regulatory auditor asks for.
- Recognised internationally — carries the ILAC-MRA & SAC-SINGLAS marks; accepted without re-testing across ILAC economies.
- Reported with uncertainty — measured values with expanded uncertainty (k=2), so you can make a defensible pass/fail decision.
- Full traceability — reference standards and the calibration procedure are named on the certificate.
- As-found results — see how the instrument was performing when it arrived.
Find your instrument
What We Calibrate
A selection of the instruments customers commonly send us. Don't see yours? Send us the model — chances are we cover it.
Electrical & Power
- Digital Multimeters (DMM)
- Analog Multimeters
- High-Precision Bench Multimeters
- Digital Clamp Meters
- Portable Appliance Testers (PAT)
- Electrical Installation Testers
- Insulation / Mega-Ohm Resistance Testers
- High-Voltage Insulation Ohmmeters
- Earth / Ground Resistance Testers
- Clamp-on Earth Ground Testers
- Ground Bond Continuity Testers
- Electrical Safety / Continuity Testers
- Leakage Current Measuring Units
- Battery Impedance / Capacity Testers
- Power Quality / Harmonic Analyzers
- Power Demand & Energy Consumption Loggers
- LCR Bridge Meters
- Capacitance & Inductance Meters
- Digital Storage Oscilloscopes
Temperature & Humidity
- Platinum Resistance Thermometer (PRT) Probes
- Precision RTD Thermometers
- RTD Simulation / Testing Units
- Standard & Portable Thermocouple Thermometers
- Thermocouple Extension / Connecting Wires
- C/J Reference Thermocouples
- Digital Temperature Indicators
- Portable Pocket Thermometers
- Multi-channel Temperature Loggers
- Temperature Data Acquisition (DAQ)
- Temperature Signal Transmitters
- Temperature Dry-Block Calibrators
- Liquid Temperature Calibration Baths
- Non-contact Infrared (IR) Guns
- Infrared Thermal Imaging Cameras
- Temperature & Humidity Meters
- Electronic Thermo-Hygrometers
- Precision Hygrometers
- Relative Humidity Transmitters
- Industrial Ovens & Freezers
- Laboratory Incubators
Pressure & Process
- Analog / Digital Pressure Gauges
- High-Range Pressure Gauges
- Low-Range Vacuum / Pressure Gauges
- Gauge-type Pressure Sensors
- Absolute Pressure Sensors
- Pressure Signal Transmitters
- Pressure Measurement Transducers
- Differential Pressure Calibration Units
- Documenting Pressure Calibrators
- Loop-powered / Process Signal Calibrators
- Multifunction Calibration Testers
- Dew Point Measurement Instruments
- Precision Timers / Stop Watches
We calibrate 120+ models from leading manufacturers
Standard turnaround
Express service available in 2 – 3 working days. We commit to the stated standard and express turnaround unless an issue found during calibration causes an unforeseen delay.
Collection, delivery & overseas
Free collection & delivery within Singapore for orders above S$300. Overseas orders welcome. Send your equipment to our Singapore laboratory.
On-site calibration
- Temperature Oven / Chiller / Freezer
- Temperature PRT / Thermocouple Sensor
- Temperature Indicator
- Thermo-hygro Probe
- Dry-Well Calibrator
- Low-Pressure / Differential-Pressure Instruments
- Pneumatic Pressure Instruments
Calibration FAQs
Straight answers about our SAC-SINGLAS accredited ISO/IEC 17025 laboratory.
Is Unitest Instruments' calibration laboratory accredited?
Yes. Unitest operates a SAC-SINGLAS accredited calibration laboratory to ISO/IEC 17025, accreditation number LA-2023-0845-C, valid to 2 August 2027. Results are recognised internationally under the ILAC Mutual Recognition Arrangement and accepted without re-testing.
What is your calibration turnaround time?
Standard turnaround is 5 – 7 working days, with an express service of 2 – 3 working days where available. We commit to these unless an issue found during calibration causes an unforeseen delay.
What is the difference between accredited and traceable calibration?
An accredited (SAC-SINGLAS ISO/IEC 17025) calibration carries the accreditation mark and is independently verified — the strongest audit evidence. A traceable calibration still traces to national standards but is not under the accredited scope. Every accredited parameter is also offered as a traceable service where accreditation is not required, or where the range/model/site falls outside scope.
Do you offer collection, delivery and on-site calibration?
Yes. Free collection & delivery within Singapore for orders above S$300. On-site calibration is available for ovens/chillers/freezers, PRT and thermocouple sensors, temperature indicators, thermo-hygro probes, dry-well calibrators and pressure instruments. Overseas orders welcome. Send your equipment to our Singapore laboratory.
How much does calibration cost?
Calibration is priced by quotation. Send us your instrument list (brand, model and quantity) and our team will provide a formal quote — usually within one business day.
Are your calibration certificates accepted for ISO 9001 audits?
Yes. Certificates issued by a SAC-SINGLAS ISO/IEC 17025 accredited laboratory are traceable to national and international standards and are accepted as objective evidence in ISO 9001 quality-management audits.
Which brands and instruments can you calibrate?
We routinely calibrate instruments from Fluke, Keysight, Agilent, Tektronix, Yokogawa, Hioki, Kyoritsu, Druck and more — over 120 models across electrical, temperature, humidity and pressure disciplines. If your instrument isn’t listed, send us the model and we’ll confirm.
Send your instrument list for a quote
Tell us the brand, model and quantity — we'll confirm scope (accredited or traceable), turnaround and pricing, usually within one business day.
- SAC-SINGLAS accredited · LA-2023-0845-C
- 5 – 7 working days standard, 2 – 3 working days express
- Free collection & delivery over S$300 · on-site available
Request a calibration quote
Tell us the instruments — we reply within 1 business day.