For CDC, vaccine programs & immunization sites
Every site, every reading, even where WiFi ends.
Vaccine cold chain monitoring designed around CDC continuous DDL guidance and WHO PQS principles — from central depot to remote site.
OPERATIONAL RISK
Vaccine cold chain fails where infrastructure is weakest.
- CDC mandates continuous monitoring with a digital data logger (DDL) recording temperature at no more than 10-minute intervals, retaining 30 days history minimum.
- Vaccines must stay at 2°C to 8°C. A single freeze or single brief excursion above 8°C can void the dose. Household refrigerators are prohibited.
- Remote vaccination sites without reliable WiFi or cellular pose the hardest cold-chain visibility challenge — but they are exactly where the most vulnerable populations are reached.
What your team needs
Continuous DDL monitoring across central depot, regional clinic, and remote site.
- ZKSCool dataloggers (S20, S20K, S6K, S6SA) all meet DDL functional requirements: continuous recording, ≤10-min intervals, electronic records, calibrated accuracy.
- G20 gateway accepts the radio module that matches each site: 5G / 4G / NB-IoT / WiFi / LoRa / 485 — one hardware across central depots, regional clinics, and remote sites.
- Designed around WHO PQS principles + 21 CFR Part 11 design alignment. Validation service available in selected countries; GSP qualification is globally available.
Our approach
A complete cold chain partnership.
01 · Hardware
DDL-compliant dataloggers + multi-radio gateway (5G / 4G / NB-IoT / WiFi / LoRa) — one platform from central depot to remote site.
02 · zTMS Cloud
Continuous monitoring dashboards, automated CDC-style temperature reports, alarm push to mobile app, SMS, and voice.
03 · Field Deployment
On-site installation support, validation service available in selected countries, and remote-site connectivity engineering.
Recommended products
Four products that fit this industry’s scenario.
S20K Datalogger
2-button · magnetic mount · WiFi or 4G · explosion-proof
Why for this industry: Clinic vaccine cabinets in any network condition — insert a 4G SIM, set-and-forget cloud streaming.
S20 Datalogger
3 channels · PT100 cryogenic · 4G + WiFi + LBS
Why for this industry: Vaccine transport with LBS location on every reading and 60K offline buffer.
S6SA Datalogger
PT100 cryogenic · door + light + vibration · 30 days
Why for this industry: Central CDC ULT vaccine storage with multi-sensor event logging and DO-160 aviation test.
G20 5G IoT Gateway
5G + 4G + NB-IoT + WiFi + LoRa + 485 · built-in sensing
Why for this industry: Remote vaccine site coverage — LoRa or NB-IoT for sites where WiFi and cellular both fail.
Compliance
Designed to support the standards this industry operates under.
GSP — globally available
21 CFR Part 11 design alignment
EU Annex 11 design alignment
GDP-aligned
ISO 17025 traceable calibration
ISO 9001 · 14001 · 45001 · 27001 · 20000-1 (company)
Our one-stop validation service offers GSP qualification globally and GxP / IQ/OQ/PQ qualification packages in selected countries — scoped per customer environment.
CASE STUDY · CDC & VACCINE COLD CHAIN
From hour-level blind spots to minute-level alerts across thousands of fridges
Shenzhen CDC, Guizhou CDC and Hunan CDC manage vaccines that must hold 2–8°C end to end — yet manual inspection intervals left long monitoring blind spots, and alarms often fired only after an excursion. ZKSCool deployed the G3+S3 wireless mesh logger: a single G3 gateway communicates bi-directionally with thousands of slim S3 sensors over ZKSCool’s proprietary interBow® low-power network, sampling temperature and humidity 24/7 to the zTMS cloud. Three-tier alarms (SMS + phone call + platform) let managers verify every dose is temperature-compliant before it leaves storage — shrinking risk-detection time from hours to minutes and closing the traceability loop from cold room to clinic.
Hours→min
Anomaly-detection time
5,000+
S3 sensors per gateway
3-tier
SMS + call + platform alarm
Where we are
60+
Countries served
500K+
Cold chain nodes monitored
5
Active ISO certifications
10 yr
Cold chain IoT experience
Frequently asked
Questions this industry asks us.
CDC requires continuous monitoring with a digital data logger (DDL). The DDL must record refrigerator temperature at no more than 10-minute intervals and retain the temperature history for the last 30 days minimum.
The WHO PQS (Performance, Quality and Safety) system prequalifies cold chain monitoring devices for UN procurement. ZKSCool dataloggers are designed around WHO PQS principles.
For sites without reliable WiFi, ZKSCool S20K accepts a 4G SIM and provides cloud streaming over cellular. For deeper-remote sites without cellular, the G20 gateway supports LoRa and NB-IoT modules.
A DDL is specifically designed for vaccine cold chain monitoring with continuous automated recording, audit-ready electronic records, calibrated accuracy. ZKSCool S20, S20K, S6K, and S6SA all meet DDL functional requirements.
zTMS generates tamper-resistant PDF and CSV exports compatible with electronic-records standards. Our one-stop validation service is available in selected countries; GSP qualification is globally available.
Talk to a vaccine cold chain specialist
Reply within 1 business day · Validation package on request · Sample units available for qualified pilots