
Dhruva
4 × temperature, or 4 × temperature + humidity (Pro)
Four-channel WiFi logger for multi-point temperature or temperature and humidity.
- Range
- −100 to +200 °C · Pro: −30 to +70 °C, 0–100 %RH
Tamil Nadu, India
WiFi and GSM temperature & humidity monitoring for Vellore's pharma, cold chain and industrial sites.
Vellore · Tamil Nadu


About monitoring here
Vellore lies in north-eastern Tamil Nadu beside the Chennai–Bengaluru highway and is known around the world for its Christian medical college and hospital, which draws patients from across India and from abroad, and for a large private technical university on the Katpadi side. The rail junction at Katpadi links the city to Chennai and Bengaluru, and the leather and footwear belt of Ranipet, Ambur and Vaniyambadi lies close by. A temperature data logger in Vellore therefore spends much of its time in the rooms that serve a hospital town: pharmacies, blood banks, laboratories and the guest-house kitchens of visiting families, as well as tannery chemical stores and footwear packing rooms in the belt around. Prithvi supplies WiFi and GSM loggers, with alerts to a phone or an inbox.
Summers are fierce and dry with hot winds, the north-east monsoon brings steady rain late in the year, and the dry heat means a store that was cool in the morning can be hot by afternoon.
Areas
A very large teaching hospital and the pharmacies, laboratories and blood bank around it keep vaccines, blood components, reagents and medicines in refrigerators and freezers on every floor.
The rail junction brings goods and parcels in at all hours, and the large university campus beside it holds laboratories, canteens and stores in many buildings.
Tanneries and chemical suppliers on the road to Ranipet keep dyes, tanning agents and finishing chemicals with printed storage limits in sheds that heat up in the dry months.
Footwear and leather-goods makers in these towns hold hides, finished goods and adhesives in packing rooms where damp air from the rains harms leather.
Industries
Hospitals and the blood bank in a town built around a medical college keep vaccines and blood components in many refrigerators, and a phone alert from a failing unit reaches the technician in the small hours.
Hospital and university laboratories hold reagents, samples and cultures in freezers and incubators, and a logged record shows a supervisor or a funder that conditions held across weekends and holidays.
Tanneries and chemical suppliers in the belt keep tanning agents, dyes and finishing chemicals with printed limits, and an alert from a heated shed gives the storekeeper time to act before material is spoiled.
Medicine wholesalers and pharmacies serving a hospital town supply chemists across the region, and a record from each store shows that tablets and injectables stayed within their limits before dispatch.
Recommended products
A starting point for the sites above. Our team will help you choose.

4 × temperature, or 4 × temperature + humidity (Pro)
Four-channel WiFi logger for multi-point temperature or temperature and humidity.
Dhruva in Vellore: Four channels let one logger follow a row of refrigerators in a hospital pharmacy or a laboratory corridor and report each unit separately.

2 × temperature, or 2 × temperature + humidity (Pro)
Two-channel WiFi logger for temperature, or temperature and humidity, at two points.
Rajmudra in Vellore: Two channels at different heights in a pharmacy store show whether warm air settles on the upper racks while the lower ones stay cool.

Temperature + humidity
SIM-based GSM logger for sites and vehicles without Wi-Fi.
Vayu in Vellore: A SIM-based GSM logger travels with a consignment or reports from a tannery shed without Wi-Fi, which suits goods moving between the belt and the ports.
These services are delivered by our parent lab, VEGA Calibrations.Ask us to plan them for your Vellore site alongside your loggers.
Process
Tell us what you store, where, and how many points need watching.
We look at the layout and conditions, by call or on a site visit, and recommend the right loggers.
Loggers are supplied and installed, then connected to your dashboard and alert recipients.
We stay available for alert rules, user access and calibration planning as your sites change.
Why Prithvi
FAQ
Each ward, pharmacy or laboratory can be set up as a named location with its own alert contacts, so the duty technician sees a drifting unit on a phone and the pharmacy head sees the full list on a desktop.
Send the town, the unit and the person who will meet us through the enquiry form, WhatsApp or a call, and we confirm how a visit would be arranged for Ranipet, Ambur, Vaniyambadi and other towns of the belt. See how a Prithvi temperature data logger works.
If the mains fails, a logger carries on recording from its own battery, uploads the stored readings once the network is back and can warn the person in charge that the supply has been lost.
A multi-channel logger can watch both freezers through separate probes, and one report then shows whether the standby held its limits when the first one failed.
Locations
Tell us what you need to monitor and where in Vellore. We will recommend the right loggers.