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DURAC PLUS

DURAC PLUS is a brand of analog bottle thermometers used for temperature monitoring in controlled environments such as freezers, ultra-low freezers, incubators, water baths, blood banks, vaccine storage, and laboratory ovens. The product line consists of direct-reading Celsius thermometers housed in glass-bead-filled bottles that simulate the thermal response of stored product, providing a stable and representative temperature indication without reliance on external power or digital calibration. These instruments are commonly specified where a simple, fail-safe visual check is required alongside electronic monitoring systems.

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About DURAC PLUS

DURAC PLUS is a brand of analog bottle thermometers used for temperature monitoring in controlled environments such as freezers, ultra-low freezers, incubators, water baths, blood banks, vaccine storage, and laboratory ovens. The product line consists of direct-reading Celsius thermometers housed in glass-bead-filled bottles that simulate the thermal response of stored product, providing a stable and representative temperature indication without reliance on external power or digital calibration. These instruments are commonly specified where a simple, fail-safe visual check is required alongside electronic monitoring systems.

The DURAC PLUS range covers a broad span of temperatures and accuracies. Models for ultra-low freezers extend from -90°C to 25°C, with accuracy of ±2.5°C below -50°C. Freezer and refrigerator models cover -30°C to 1°C with ±0.75°C accuracy. Incubator and water bath variants span -5°C to 50°C with accuracies from ±0.5°C to ±0.75°C. Blood bank, vaccine, and critical refrigeration thermometers offer tighter accuracy of ±0.4°C over ranges such as -2°C to 10°C and 15°C to 30°C. Lab oven thermometers cover 50°C to 200°C with ±2.5°C accuracy up to 100°C and ±5°C above 100°C. Bottle volumes are 30 mL for most models and 60 mL for blood bank and critical refrigeration units, with glass beads as the fill medium to buffer against rapid temperature fluctuations.

3G Electric supplies the DURAC PLUS line as part of its industrial and laboratory equipment catalog. The product family is relevant to plant engineers, maintenance managers, and procurement specialists who need analog temperature references for cold chain, life science, and process applications. Because the thermometers are mechanical and require no power or wiring, they can be deployed as standalone indicators or as backup to digital systems. 3G Electric supports the line with global logistics, product documentation, and access to the full range of DURAC PLUS bottle thermometers, including models differentiated by temperature range, accuracy, and bottle size. The catalog includes SKUs such as 12L969, 12L970, 12L973, 12L975, 12L976, 12L977, 12L978, and 12L981, each targeting a specific application envelope. Buyers can select the appropriate model based on the required temperature span, accuracy tolerance, and bottle volume for their storage or process environment.

Common Applications

  • Ultra-low freezer monitoring — DURAC PLUS SKU 12L976 covers -90°C to 25°C with ±2.5°C accuracy below -50°C for cryogenic storage.
  • Blood bank and vaccine refrigeration — DURAC PLUS SKU 12L969 and 12L970 provide ±0.4°C accuracy over -2°C to 10°C and 15°C to 30°C.
  • Laboratory incubators — DURAC PLUS SKU 12L975, 12L977, and 12L978 cover -5°C to 50°C with ±0.5°C to ±0.75°C accuracy.
  • Water baths — DURAC PLUS 30 mL glass-bead bottle thermometers provide direct Celsius readings for temperature verification.
  • Lab ovens — DURAC PLUS SKU 12L981 measures 50°C to 200°C with ±2.5°C accuracy up to 100°C for oven monitoring.
  • Standard freezers — DURAC PLUS SKU 12L973 covers -30°C to 1°C with ±0.75°C accuracy for general freezer temperature checks.

Frequently asked questions

Common questions about DURAC PLUS from 3G Electric.

What temperature range does the DURAC PLUS analog bottle thermometer for ultra-low freezers cover?

The DURAC PLUS ultra-low freezer model, SKU 12L976, covers -90°C to 25°C with an accuracy of ±2.5°C below -50°C. It uses a 30 mL glass-bead-filled bottle to buffer temperature changes and provide a stable reading. This model is intended for monitoring ultra-low temperature freezers where a direct-reading analog reference is required. A separate freezer model, SKU 12L973, covers -30°C to 1°C with ±0.75°C accuracy for standard freezer applications.

Which DURAC PLUS bottle thermometers are suitable for blood bank and vaccine storage?

DURAC PLUS offers two models for blood bank, vaccine, and critical refrigeration environments: SKU 12L969 covers -2°C to 10°C with ±0.4°C accuracy, and SKU 12L970 covers 15°C to 30°C with ±0.4°C accuracy. Both use a 60 mL glass-bead-filled bottle for thermal buffering. These thermometers provide direct Celsius readings and are designed for applications requiring tighter accuracy than general-purpose freezer or incubator models.

What is the purpose of the glass beads in DURAC PLUS bottle thermometers?

The glass beads inside the DURAC PLUS bottle thermometers simulate the thermal response of stored product, such as vaccines, blood samples, or reagents. This buffering effect means the thermometer indicates temperature changes at a rate closer to the actual contents of the storage unit, rather than responding instantly to air temperature fluctuations. The bottle volume—30 mL or 60 mL depending on the model—further influences thermal stability. This design helps users assess whether stored materials have been exposed to temperature excursions.

Can DURAC PLUS analog bottle thermometers be used in laboratory ovens?

Yes. The DURAC PLUS lab oven model, SKU 12L981, covers 50°C to 200°C with an accuracy of ±2.5°C up to 100°C and ±5°C above 100°C. It features a 30 mL glass-bead-filled bottle. This thermometer is intended for monitoring temperature inside laboratory ovens where a direct-reading analog instrument is preferred or required as a secondary check. It is not intended for use in ovens exceeding 200°C.

What accuracy can I expect from DURAC PLUS incubator and water bath thermometers?

DURAC PLUS incubator and water bath thermometers are available with accuracies of ±0.5°C and ±0.75°C, depending on the model. For example, SKU 12L977 covers 10°C to 45°C with ±0.5°C accuracy, while SKU 12L975 covers -5°C to 20°C and SKU 12L978 covers 15°C to 50°C, both with ±0.75°C accuracy. All use a 30 mL glass-bead-filled bottle. Model selection depends on the specific temperature range and accuracy required for the incubation or water bath process.

How does 3G Electric support the DURAC PLUS product line?

3G Electric supplies the DURAC PLUS analog bottle thermometer range as part of its catalog of industrial and laboratory equipment. Support includes access to the full line of models differentiated by temperature range, accuracy, and bottle volume, along with product documentation and global logistics. Buyers can source specific SKUs such as 12L969, 12L970, 12L973, 12L975, 12L976, 12L977, 12L978, and 12L981. 3G Electric serves plant engineers, maintenance managers, and procurement specialists who require analog temperature references for cold chain, life science, and process applications.