Temperature alerts for Low Temperatures

Many products, vaccines, pharmaceuticals, and research samples have varying development, production, and storage needs. They all require resilient, reliable, and proactive monitoring during the cold chain. Monnit’s Low Temperature Sensors are a vital tool for pharmaceutical and health care professionals, food manufacturers, and distributors.

Whether keeping vaccines in an ultralow temperature (ULT) freezer throughout your cold chain, remotely monitoring logistics for frozen commodities to and from warehouses, or cadaver storage monitoring in a morgue, you can count on Monnit’s Low Temperature Sensors. The instant temperatures rise above your preset limits; you get a sensor alert sent via text, email, or call.

Highlights of low-temp sensors

The Wireless Low Temperature Sensor uses a glass-coated platinum resistance temperature detector (RTD) sensor to accurately measure temperatures from -200°C to 0°C (-328°F to +32°F).

Monnit’s Wireless Low Temperature Sensor outputs the ambient temperature in degrees Celsius or Fahrenheit. It’s programmed to sleep for a user-given time interval (heartbeat) and then wake up, power up the RTD sensor, and wait for it to stabilize. Then it mathematically computes the temperature and transmits the data to the gateway.

An industry-leading 25-month NIST certification is available on Monnit Low Temperature Sensors.

This sensor isn’t meant for wet, damp, high-humidity environments. This sensor should only operate in dry, low-humidity environments. The Low Temperature Sensor operates at extremely low temperatures and can withstand external condensation.

Features

• Impressive wireless range of up to 1,200 feet through walls
• Frequency-hopping spread spectrum (FHSS)
• Improved interference immunity
• Improved power management for longer battery life
• Encrypt-RF® Security (Diffie-Hellman Key Exchange + AES-128 CBC for sensor data messages)
• Over-the-air updates
• Free iMonnit basic online wireless sensor monitoring and notification system to configure sensors, view data and set alerts via SMS text and email
• Stores 2000 to 4000 readings if gateway connection is lost (non-volatile flash, persists through the power cycle)
  • 10-minute heartbeats = ~ 22 days
  • 2-hour heartbeats = ~ 266 days

Applications

• Freezers and coolers
• Environmental monitoring
• Vaccine Storage Temperature Monitoring
• Cryogenic Storage Monitoring
• Laboratory Sample Monitoring

Gateway Options for Seamless IoT Data Communication

Monnit offers a range of gateway options designed to facilitate wireless sensor data communication within IoT networks. These gateways, serve as crucial conduits for transmitting sensor data to the iMonnit software platform and play a pivotal role in ensuring seamless and efficient data transmission for IoT applications.

Click here to explore the diverse range of gateway devices available >>

Manage Your Monnit Sensors with iMonnit Cloud-based Software

Monnit’s Sensor Monitoring Software, iMonnit, stands as a cutting-edge cloud-based platform and central hub tailored for the seamless management of Monnit sensors. With a focus on data security, all information is safeguarded on dedicated servers running Microsoft SQL Server. This intuitive online user interface serves as a command centre for arranging, monitoring, and modifying device settings to suit individual requirements.

OneTemp provides complimentary activation and setup services for new iMonnit accounts, while a free mobile app empowers users to maintain control at all times. Whether opting for the basic version or upgrading to iMonnit Premiere, users can unlock the full spectrum of features that enrich the Monnit experience.

Click here to explore the software options >>

 

Supply voltage	2.0-3.8 VDC (3.0-3.8 VDC using power supply)1
Current Consumption	0.2 μA (sleep mode), 0.7 μA (RTC sleep), 570 μA (MCU idle), 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX mode)
Operating temperature range (board circuitry and batteries)	-18°C to 55°C (0°F to 130°F) using alkaline -40°C to 85°C (-40°F to 185°F) using lithium
Optimal battery temperature range (AA)	+10°C to +50°C (+50°F to +122°F)
RTD temperature range (RTD and cable only)	-200°C to 0°C (-328°F to +32°F)
Accuracy @ 0°C	+/- 3.3°C Standard (+/- 0.5°C Calibrated)2
Dissipation constant	2mW/°C
Thermal time constant	15 sec max
Data logging	Data logs 2000 to 4000 readings if the gateway connection is lost (non-volatile flash, persists through the power cycle): – 10-minute heartbeats = ~ 22 days – 2-hour heartbeats = ~ 266 days
Wireless range	1,200+ ft non-line-of-sight
Security	Encrypt-RF® (256-bit key exchange and AES-128 CTR)
Weight	3.7 ounces
Lead	Probe type – 316 stainless steel Dimensions – 4.8 mm x 25mm
Certifications	900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1. 868 and 433 MHz product tested and found to comply with: EN 300 220-2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02), and EN 60950

¹ Hardware cannot withstand negative voltage. Please take care when connecting a power device.
² See RTD accuracy chart below.

 

RTD Accuracy
Temperature (°C)	Accuracy (±°C)
	Uncalibrated	Calibrated
-200°C	4.30	1.50
-180°C	4.20	1.40
-160°C	4.10	1.30
-140°C	4.00	1.20
-120°C	3.90	1.10
-100°C	3.80	1.00
-80°C	3.70	0.90
-60°C	3.60	0.80
-40°C	3.50	0.70
-20°C	3.40	0.60
0°C	3.30	0.50
20°C	3.40	0.60
40°C	3.50	0.70
60°C	3.60	0.80
80°C	3.70	0.90
100°C	3.80	1.00
120°C	3.90	1.10
140°C	4.00	1.20
160°C	4.10	1.30