FRIO-TEMP

FRIO-TEMP Standard Thermometers generally cover wider temperature ranges, such as -58°F to 392°F (-50°C to 200°C), and use glass beads as the bottle fill medium. They are suited to general-purpose monitoring in liquids, air, or incubators. FRIO-TEMP Analog Bottle Thermometers for Freezers & Ultra-Low Freezers are optimized for lower temperatures, with ranges extending to -90°C, and may use either glass beads or Enviro-Safe® liquid. They often have tighter accuracy specifications, such as ±0.2°C or ±0.5°C, and are available in 30 mL or 60 mL bottle volumes. The choice depends on the target temperature range, required accuracy, and whether a specific fill medium is mandated by your monitoring protocol.

Enviro-Safe® liquid is a non-toxic, biodegradable heat-transfer fluid used as the fill medium in certain FRIO-TEMP bottle thermometers. It replaces mercury or alcohol, which are hazardous if the bottle breaks. The liquid provides a stable thermal response and is compatible with a range of temperatures, including freezer and ultra-low freezer applications. FRIO-TEMP models using Enviro-Safe® liquid are available with accuracy specifications such as ±0.2°C, ±0.5°C, or ±1°F, depending on the model. The fill medium is sealed inside the bottle probe and does not require maintenance. When selecting a thermometer, confirm that the Enviro-Safe® liquid formulation is suitable for your temperature range and that the bottle volume fits your installation.

Start by defining the normal operating temperature and the alarm limits. For a standard freezer at -20°C, a FRIO-TEMP model with a range of -30°C to 1°C and ±0.5°C accuracy, such as SKU 12L958 or 12L947, is appropriate. For ultra-low freezers at -80°C, select a model with a range extending to -90°C, such as SKU 12L945, which has accuracy of ±1°C and deviations of ±2.5°C below -40°C. Consider the bottle volume: 30 mL bottles fit smaller spaces, while 60 mL bottles provide a larger thermal mass. If you need to read the display without opening the door, choose a model with a cable, such as the 1 m cable on many Standard Thermometers. Always verify that the thermometer's accuracy at your setpoint meets your monitoring requirements.

FRIO-TEMP analog thermometers are factory-calibrated to the stated accuracy specification. They do not require batteries or external power. Recalibration is typically performed by adjusting the analog movement, but the specific procedure depends on the model. For regulated environments, you may need to send the thermometer to a calibration laboratory or use a reference thermometer to verify performance at your setpoint. 3G Electric can provide datasheets with accuracy specifications, but calibration certificates are not included unless explicitly requested. If your quality system requires traceable calibration, discuss this with your procurement team before ordering. The simple analog design generally makes field verification straightforward with an ice bath or a reference probe.

Many FRIO-TEMP Standard Thermometers include a 1 m cable, which allows the bottle probe to be placed inside a controlled environment while the display is read outside. This is useful for refrigerators, freezers, and incubators where opening the door to read the thermometer would disturb the temperature. The cable length is specified in the product datasheet. For freezer and ultra-low freezer models, cable length may vary; some models are designed for direct placement without a remote cable. If you need a specific cable length, check the individual SKU specifications or contact 3G Electric for available options. Cable length does not affect accuracy, but it should be long enough to route from the probe location to the readout location without strain.

Yes, FRIO-TEMP bottle thermometers are designed to be immersed in liquids or used in air. The bottle probe is sealed, and the fill medium (glass beads or Enviro-Safe® liquid) is contained within. When used in liquids, ensure that the bottle and cable are compatible with the liquid and that the temperature range is within the thermometer's specified limits. The glass bead fill provides a stable thermal mass, while Enviro-Safe® liquid may respond faster. For sanitary applications, verify that the materials in contact with the liquid are acceptable. The analog display should remain outside the liquid unless the model is specifically rated for full immersion. Always follow the manufacturer's instructions for immersion depth and cleaning.