What Is The Function Of A Glycol Temperature Probe?

What Is The Function Of A Glycol Temperature Probe?

Glycol-encased temperature probes are designed for temperature monitoring – particularly for vaccine and pharmaceutical refrigeration and storage. This article details the key functions of glycol temperature probes then explores five excellent examples of thermometers and data loggers that employ this technology.

About Glycol Temperature Probes

These scientific instruments are temperature probes encased in a glycol solution that acts as a buffer to prevent incorrect or unclear temperature readings.

The primary purpose of glycol buffers is to protect against sudden and sharp air temperature changes - such as fluctuations due to the opening or closing of refrigerator doors or normal defrost cycles.


Functionality explained:
Imagine you are monitoring the temperature of materials stored in an enclosed environment, such as a fridge. The opening and closing of the fridge doors will readily alter air temperature more quickly than the materials being monitored. Similarly, an open-air temperature probe will react to changes in air temperature more readily than a buffered glycol temperature probe.

TLDR (Too Long Didn't Read): A buffered probe will more accurately reflect the temperature of the items stored within a fridge or freezer, particularly vaccine vials, compared to an unbuffered probe.

 

The Benefits of Glycol as a Buffer for Temperature Probes

  • Glycol mimics the temperature readings of fluids commonly stored in pharmacy and laboratory refrigerators and freezers.
  • Glycol’s low freezing point results in more accurate measurements in cold environments.
  • Glycol buffering prevents inaccurate measurements and false alarms during rapid temperature fluctuations that pose no risk to stored goods.
  • Glycol is non-toxic, making it highly versatile and suitable for use in restricted and controlled laboratories. It is a recommended buffer by the World Health Organization (WHO), Food and Drug Administration (FDA) and the Centers for Disease Control (CDC).

Thermometers and Data Loggers with Glycol Temperature Probes

Our Scientists have assembled examples of thermometers and data loggers utilising glycol-encased temperature probes for accurately monitoring the temperature of materials stored in fridges and freezers. 

1. FlashCheck Certified Min-Max Alarm Thermometer
Product code: IC-12238
 

The IC-12238 Certified Alarm Thermometer features:

  • 1 x stainless steel blunt probe enclosed in a sealed plastic bottle of propylene glycol
  • 1 x 3-meter sensor cable
  • min/max memory
  • large and easy-to-read LCD, and
  • high/low alarm settings to alert you when your preset temperature parameters are breached. 

This thermometer is recommended for monitoring temperatures inside freezers, refrigerators and cold holding display cases.

Type: Thermometer
Temperature Range:  -50°C to 70°
Temperature Accuracy:  ±0.5°C (-30°C to 55°C); otherwise ±1.0°C 

 

2. Cx400 Series Data Loggers For Vaccine Refrigerators
Product code: IC-CX402-T215

The CX402-T215 closely monitors temperatures in refrigerators, freezers and other temperature-controlled environments.  Collected information is sent to an app on a smart device via Bluetooth Low Energy. 

Key benefit: The Intemp app (Apple & Android) allows you to view your data logger’s status, set alarms remotely, and create and download PDF reports while ‘on the go’

Other features:

  • built-in LCD screen to view current and daily min/max temperatures
  • advanced audible and visual alarm capabilities for notification of temperature excursions
  • internal sensor for ambient temperature monitoring, and
  • NIST Certification of Calibration.

Type: Data Logger
Temperature Range: -40° to 100°C
Temperature Accuracy:  ±0.5° C from 0° to 50° C

  

3. USB Vaccination Monitoring Kit
Product code: IC-EL-USB-VAC


The IC-EL-USB-VAC is a temperature data logger with a glycol bottle probe designed for vaccination monitoring.

Features and Benefits: 

  • Effortless initial data logger configuration and data downloading – plug a USB into a computer to interface with the free, intuitive EL-WIN-USB software that runs on Windows.
  • Measures and stores 32,510 time and date-stamped readings before requiring download to a computer.
  • Information at a glance - press a button on the unit to cycle through recent highest and lowest stored temperature readings, plus view them on the high contrast LCD.

Type: Data Logger
Temperature Range: -40° to 100°C
Temperature Accuracy: ±0.1°C 

 

4. Dual-Channel GFX Vaccine Monitoring Kit with Graphic Screen and Audible Alarm
Product code: IC-EL-GFX-VAC2


The IC-EL-GFX-VAC2 is a dual-channel vaccine monitoring kit with the capacity to measure and store up to 250 000 readings.

Features & Benefits:

  • Select the logging rate and start-time, plus download the stored data by plugging the data logger into a PC's USB port, then running the purpose-designed software under Windows XP, Vista, 7 & 8.
  • This model includes two glycol filled bottles with thermistor probes on 3.0m cables -suitable for monitoring two areas simultaneously.

Type: Data Logger
Temperature Range: -40° to 100°C
Temperature Accuracy: ±0.1°C (-10 to 70°C ) ±0.3°C (remaining range)

  

5. Vaccine Temperature Monitoring System (Vtms) Data Logger
Product code: IC-VTMS


The advanced Vaccine Temperature Monitoring System (VTMS) by Madgetech is ideal for the continuous measurement and data logging of temperature sensitive vaccines or pharmaceuticals in refrigerators, freezers, and coolers.

Features & Benefits:

  • The RFTCTemp2000A data logger in the VTMS system has a convenient LCD to ensure temperature parameters can be monitored in real-time.
  • Minimum, maximum and average statistics are viewed via the LCD.
  • When set to real-time chart recording mode, the VTMS sends alerts via email or text messages anytime the monitored refrigerator has failed or when the outside temperature breaches a nominated range - so you can take immediate action to ensure vaccines and pharmaceuticals in storage are preserved.


Type: Data Logger
Temperature Range: -50 °C to +80 °C 
Temperature Accuracy: ±0.5 °C

 

Conclusion

Glycol temperature probes closely mimic the temperature storage properties of vaccines and pharmaceutical products, prevent false alarms caused by rapid air temperature fluctuations within the monitored environment, and meet best practice international health and safety standards. All these attributes make glycol temperature probes the preferred technology for monitoring laboratory and pharmaceutical fridges.

For more information on glycol temperature probes for vaccine and pharmaceutical monitoring, speak with an Instrument Choice Scientist! Call 1300 737 871 or email [email protected].

Also interesting

Product Review: Kestrel 5200 Professional Environment Meter

The Instrument Choice Team of Scientists regularly reviews new and popular products, so when searching for the perfect scientific instrument for your application, you can make more informed decisions.

This article evaluates the Kestrel 5200, a multi-purpose, robust and waterproof handheld environmental meter that measures over 15 essential weather parameters for monitoring work sites, conditions before pouring concrete, balancing HVAC systems, and spraying crops.

Get our scientists’ review of the powerful, multi-purpose Kestrel 5200 Professional Environment Meter 

Read More
Product Review: Kestrel 5200 Professional Environment Meter

How To Utilise Weather Alarms To Optimise Your Home Garden

A home weather station provides hyperlocal weather information to help you plan your life. This article extends this theme and shows how to use home weather data and your weather station’s features to enhance the health of your plants in good conditions and avoid catastrophic damage when the weather decides to turn nasty.

Get the 3 Secrets – How to Enhance and Protect Your Home Garden with a Home Weather Station

Read More
How To Utilise Weather Alarms To Optimise Your Home Garden