Question 1

How does sensor calibration work? (ISO 17025 / DAkkS)

Accepted Answer

For critical areas (e.g., pharma, laboratory), regular calibration is mandatory. We offer two models:

• Exchange Service: We send you freshly calibrated probes or devices before the calibration interval expires.

• On-site Calibration: A service provider calibrates the sensors at your location while we digitally synchronize the data.

Milesight sensors (e.g., TS301) support easy probe replacement without having to disassemble the entire device.

Question 2

Does the system meet requirements for pharmaceuticals (GDP)?

Accepted Answer

Yes. For storing medicines and vaccines (Good Distribution Practice), more precise measurements and warning systems are often required. We use special PT100 sensors (e.g., Milesight TS101 or EM500-PT100) that cover an extremely wide measurement range (down to -200°C for dry ice/nitrogen) and work with high precision.

Question 3

How long is data stored?

Accepted Answer

This depends on your booked service level. By default, we store data for 12 to 24 months to enable seasonal analyses. For audit purposes, we offer long-term archiving (e.g., 5 or 10 years) on "Cold Storage" in the cloud to cost-effectively meet legal retention periods.

Question 4

Does the system replace my HACCP lists?

Accepted Answer

Yes, the system fully digitizes temperature documentation. Manual lists are eliminated. We still recommend regular visual inspection of the devices (e.g., for icing), which is facilitated by the displays on the sensors.

Question 5

Do I need to drill holes in my cold rooms?

Accepted Answer

In 95% of cases: No. We use flat cable probes that can be routed through the rubber door seal without damaging the insulation. The wireless sensor itself is magnetically attached to the outside of the cell. This is non-invasive and installed in minutes.

Question 6

How often do batteries need to be replaced?

Accepted Answer

Thanks to LoRaWAN technology, the sensors are extremely energy-efficient. With a typical transmission interval of 10 to 15 minutes, batteries (e.g., in the Milesight EM320-TH) last 5 to 10 years. Our Operations team proactively monitors battery status and contacts you months in advance before a replacement is needed.

Question 7

We have branches at 50 locations. Can this be managed centrally?

Accepted Answer

Yes, this is the strength of our architecture. Each branch gets a small gateway (Plug & Play). All data flows into a central dashboard. Your quality manager at headquarters sees the status of all 50 locations on a map ("Single Pane of Glass") and can make comparisons.

Question 8

Does the radio work from closed metal refrigerators?

Accepted Answer

Yes. We use LoRaWAN, which physically has very high penetration. For difficult cases (thick steel doors), we use sensors with external probes: The flat cable probe goes inside, the transmitter unit sticks magnetically to the outside of the housing. This guarantees 100% reception.

Question 9

What happens during power or internet outage?

Accepted Answer

The sensors are battery-powered (continue running). Additionally, our Milesight models have internal storage for up to 10,000 measurements. As soon as the gateway is back online, the missing data is automatically uploaded to the cloud ("Data Retrieval"). There are no gaps in the documentation.

Question 10

How do we prevent false alarms (e.g., during defrost cycles or loading)?

Accepted Answer

Nothing is worse than "Alarm Fatigue" (desensitization from false alarms). We configure intelligent hysteresis in the backend: An alarm is only triggered when the temperature has been above the threshold for a defined time (e.g., 20 minutes). This way, briefly opening the door or normal defrost cycles don't immediately trigger a panic SMS.

Question 11

Can we set different thresholds for day and night?

Accepted Answer

Yes. Our alarm logic (in Grafana or ThingsBoard) is flexible. We can set up schedules, e.g., to tighten tolerance limits at night when cold storage doors should be closed, compared to daytime during busy goods receiving.

Question 12

Can I also monitor humidity?

Accepted Answer

Yes. Many of our sensors (like the EM320-TH) are combination devices for temperature and relative humidity. This is particularly important for storing dry goods, vegetables, cigars, or in server rooms to prevent mold growth or static discharge.

Question 13

What happens if I miss an alarm?

Accepted Answer

We set up escalation chains:

• After 15 min: Email to branch manager.
• After 30 min: SMS to district manager.
• After 60 min: Automated voice call to emergency service.

This ensures that critical problems are not ignored.

Seamless Temperature Monitoring.HACCP-Compliant & Managed.

The End of Paper Lists.

The Risk

The Solution

The Compliance Gap

The Solution

The Data Island

The Solution

Legal Certainty Through EN12830 Standard.

Certified Hardware

Seamless History

HACCP Support

Infrastructure for Cold Chain.

merkaio core

merkaio ops

merkaio cloud

Hardware That Withstands the Cold.

Milesight TS301 / TS302

Milesight EM320-TH

Milesight TS101

See Milesight Temperature Monitoring in Action

Data That Passes Audits.

Frequently Asked Questions

Secure Your Cold Chain.