Masy Scientific Temperature Standard

Masy STS Digital Thermometer

The reliability of multiple liquid-in-glass thermometers in one precise digital device.

The Masy Scientific Temperature Standard (STS) offers a broad range of temperature measurement with precise accuracy in one easy-to-use handheld digital thermometer. The Masy STS can also serve as a reference standard for calibrating other types of digital or analog temperature indicators. It's a rugged and reliable complement to, or replacement for, IRTDs. 

With its compact, integrated design, you can use the Masy STS virtually anywhere, providing accurate temperature measurement in laboratory, manufacturing, and storage environments. And with up to 300 hours of continuous use on one battery charge, the Masy STS is ready for use whenever you need it. Best of all, the Masy STS arrives with NVLAP accredited, NIST traceable calibration, giving you confidence in your temperature sampling.


Masy Scientific Temperature Standard Benefits



Integrated quick-response thin film sensor probe

  • 3/16" and 1/4" diameter options
  • 12" and 18" length options
  • Rigid probe option with 90° rotation for easy reading
  • Wired probe option for easy interior temperature measurement


User-configurable interface options

  • Trend indicator monitors stability and temperature trending
  • Min/max storage and recall
  • Selectable sampling rate
  • High-intensity blue backlight for easy reading in any condition


Optional data logging capabilities

  • Optional BetaLOG TI software turns your STS into a high-performance temperature data logger
  • Create custom logging profiles for your STS
  • Download STS data to TXT, CSV, or XLS files for analysis and reporting

Masy Scientific Temperature Standard Specifications

The Masy STS is available in three temperature range options, covering the most common temperatures found in pharmaceutical, medical device, and life science product processing and production. Choose the right Masy Scientific Temperature Standard for your needs.


Model STS60 STS40 STS40E

-50 to 160°C
-58 to 320°F

-85 to 150°C
-121 to 302°F
-95 to 156°C
-139 to 313°F
Accuracy (1 year) ±0.06°C


Resolution 0.1, 0.01, 0.001 (user selectable)
Sample Rate 0.5/sec, 1/sec, 2/sec (user selectable)
Environmental Operating Temperature: -10°C to 50°C

Operating Humidity: 0 to 95% RH non-condensing

Storage Temperature: -20 to 60°C

Enclosure: IP50
Environmental Effect ±10 ppm/°C from -10 to 18°C and 28 to 50°C
EMC Compliance EN 61326:2006 Annex C,
CISPR II, Edition 5.0-2009 Class “B”
Power Battery: three (3), size AAA standard alkaline batteries

Battery Life: 300+ hours continuous without backlight use
Auto Shutoff User configurable 1 to 30 minutes or disabled
Size (readout only) 4” x 2” x 1” (10 cm x 5 cm x 3 cm)
Probe 3/16” diameter x 12” length (5 mm x 300 mm)
Other sizes upon request
Weight 6.9 oz (75 g)
Accessories Includes: manual, NIST traceable calibration certificate, batteries, case


Contact us with your metrology hardware and software requirements, and let us help you find the optimal system for your needs.

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