Wireless Tunnel™ Radio Sensor based on LoRa™ Technology
Temperature Sensor with built in calibration check
Wireless Tunnel™ NIST2 sensors feature 2x NIST traceable, calibrated temperature sensors in a single stainless steel tube. Working as a pair they check each others values once a second for accuracy. If we deteect the sensors are out of acceptable tolerances an alert is sent warning that the sensor requires re-calibration. NIST4 sensors come with 3x NIST traceable, calibrated temperature sensors in a single stainless steel tube. They work in pairs, with the averages of each pair averaged to give an overall reading. Improved accuracy and calibration checks with failover. Should any pair be out of calibration that value is ignored and an alert generated to warn that a pair is out of calibration.
- 4x AA Battery powered, with 10 year life*
- USB 5VDC external power.
- 12VDC external power.
- Custom sensor cable length up to 15ft to position sensor in optimal location.
- NIST2 dual sensor calibration integrity check.
- NIST3 triple sensor calibration integrity check with failover.
Glycol Buffer for Medical Refrigerators
When monitoring the temperature inside medical refrigerators, it is industry best practice to place the sensor in a jar of glycol. This acts as a buffer against temperature fluctuations that can occur when the refrigerator door is opened or closed. The important value when monitoring temperature sensitive drugs and vaccines is the actual liquid temperature. Many vaccines should be kept between 2°C and 8°C. They are very sensitive top freezing temperatures and can withstand short periods at elevated temperatures. In order to avoid false alarms or the disposal of drugs and vaccines that may still be viable, the sensor should be placed in a jar of glycol. The liquid glycol will simulate the rate of temperature change seen in the pharmaceutical products. Refrigerators go through cycles of the compressor being on and off to maintain the temperature range inside the refrigerator. When the door is opened warm air will be sucked inside. A standard temperature sensor may register a temperature excursion above 8°Cwhen the door is opened. However, the sensor inside the glycol will not register this change, as the liquid thermal mass will retain the cold temperature during the time the door is opened. In the below graph, you can see the rapid fluctuations of the temperature sensor exposed to air (red line) and the much slower response and stable temperature measured in the glycol.
Wireless Tunnel™ Monitoring Solutions
*10 years at 25°C broadcasting every 15 minutes. Batteries not included.
NIST2 or NIST3 calibrated temperature sensor. NIST2 sensors feature built in calibration check. NIST3 sensor features built in calibration check with failover for continuous monitoring in the event of primary sensor failure.
NIST2 or NIST3 calibrated temperature sensor with glycol jar attachment (glycol not included). Used as a buffer against temperature fluctiations in the pharmaceutical industry when medical refrigerators are opened and closed.
NIST2 or NIST3 calibrated temperature sensor on 3ft cable with glycol jar attachment (glycol not included). Used as a buffer against temperature fluctiations in the pharmaceutical industry when medical refrigerators are opened and closed.
NIST2 or NIST3 calibrated temperature sensor with door contact. Monitor temperature with calibration integrity checker and security sensor. Check that doors, cabinets or medical refrigerators are closed.
|Measurement Range||-40°C to +75°C
-40°F to +167°F
|Measurement Resolution||0.1°C increments
|Measurement Accuracy||Typical :
* ±0.2 from 0ºC to +75ºC
* ±0.4 from 32ºF to +167ºF
* ±0.4 at -40ºC and ±0.4 at +75ºC
* ±0.7 at -40ºF and ±0.7 at +167ºF
Dual sensor calibration check – alert when out of calibration
WTS-NIST3 sensors include second pair for failover
|Status Indication||LED indication for
|Components||Manufactured using highly integrated, low power surface mount technology to ensure long term reliability.|
|Operating Environment||Temperature : Min. -35° C – Max.80° C
Humidity: Min. 20% – Max. 80% (Non-Condensing)
|LoRa (R) Radio
|– EU868 : 863~868Mhz Max TX Power +14dBm Duty Cycle 1%
– US915: 903~915Mhz Max TX Power +17dBm
– AS923 : 920~925Mhz Max TX Power +14dBm Duty Cycle 1%
– KR920 (Korea) : 922~923Mhz Max TX Power +14dBm Duty Cycle 1%
– IL917 (Israel) : 915~917Mhz Max TX Power +14dBm Duty Cycle 1%
|Certification||FCC Part15C, CE EN300220-2, NIST Calibration Certificate|
|Interface||Micro-USB port for powering, adding and upgrading to the Gateway base unit|
|Mounting||Wall hanging, DIN rail, Pipe Clamp|
|Power source||4xAA batteries or via micro-USB port|
|Power Consumption||Average 12 mWatt, 10uA in Idle, up to 10 years battery life.|
|Gateway sensor count||6 (3 + 3)|
|Calibration||NIST traceable Calibration Certificate
Built in calibration check, alerts when sensor needs re-calibration
Optional failover sensor when out of calibration (WTS-NIST3)