
Rajmudra
2 × temperature, or 2 × temperature + humidity (Pro)
Two-channel WiFi logger for temperature, or temperature and humidity, at two points.
- Range
- −100 to +200 °C · Pro: −30 to +70 °C, 0–100 %RH
Tamil Nadu, India
WiFi and GSM temperature & humidity monitoring for Madurai's pharma, cold chain and industrial sites.
Madurai · Tamil Nadu


About monitoring here
Madurai is the great temple city of southern Tamil Nadu, on the Vaigai river, and it is also the region's main trading and medical centre. Its markets at Mattuthavani move vegetables, fruit and flowers, including the jasmine the district is known for, while Sungudi sarees, readymade garments and food products come from small units across the city and the estates at Kappalur and Tirumangalam. Large government and private hospitals, among them a big eye hospital, draw patients from many southern districts. A temperature data logger in Madurai therefore protects stock that spoils quickly: flowers in cold rooms before dispatch, medicines and eye-care supplies in hospital stores, and packed food in sheds that bake in the long dry heat. Prithvi supplies WiFi loggers for rooms and GSM loggers for vehicles, with alerts to a phone or an inbox.
Summers are long, hot and dry, the north-east monsoon brings heavy rain in the last months of the year, and the air between those seasons is dry, so heat is the main danger for most of the year and damp for a few weeks.
Areas
The wholesale market for vegetables, fruit and flowers, with cold rooms and sheds around it, where jasmine and other cut flowers lose freshness fast in a warm spell.
Industrial estates south of the city with engineering, food, plastics and packaging units on plots of mixed size, where one owner may run several stores a walk apart.
Small units across the city dye, print and stitch cotton sarees and garments, and finished stock waits for dispatch in stores that turn humid in the rainy weeks.
The government medical college hospital, a large eye hospital and many private hospitals keep vaccines, blood components, medicines and eye-bank supplies in refrigerators serving southern districts.
Industries
Flower exporters, vegetable traders and packed-food makers hold stock that suffers soon after a cooling failure, so a phone alert from a cold room matters most at night and on market holidays.
Hospitals in Madurai draw patients from many districts and keep vaccines, blood components and eye-care supplies in refrigerators on many floors, which are easier to supervise when every unit reports to one screen.
Saree makers and garment units keep cotton, dyes and finished stock in rooms that turn humid in the rains, and a humidity record shows a buyer how the goods were held before they were packed.
Medicine wholesalers supply chemists across the south, and a record from each store shows that tablets and injectables stayed within their printed limits before they left on a van.
Recommended products
A starting point for the sites above. Our team will help you choose.

2 × temperature, or 2 × temperature + humidity (Pro)
Two-channel WiFi logger for temperature, or temperature and humidity, at two points.
Rajmudra in Madurai: Two channels, one at each end of a flower cold room, show whether the whole space is cooled or only the part nearest the unit.

4 × temperature, or 4 × temperature + humidity (Pro)
Four-channel WiFi logger for multi-point temperature or temperature and humidity.
Dhruva in Madurai: Four channels let a single logger follow the refrigerators of a hospital pharmacy or a blood bank, with a separate line on the report for each unit.

Temperature + humidity
SIM-based GSM logger for sites and vehicles without Wi-Fi.
Vayu in Madurai: A SIM-based GSM logger travels with flowers or medicines in a van, or reports from a depot without Wi-Fi, which suits goods moving out to other districts.
These services are delivered by our parent lab, VEGA Calibrations.Ask us to plan them for your Madurai 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
A temperature record from the cold room and from the vehicle shows how long the flowers stood warm before they reached the buyer, and an alert on a rising reading reaches the packing manager while the stock can still be moved. See how a Prithvi temperature data logger works.
Send the estate, 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 the estates around Madurai.
Each ward, pharmacy or eye-bank store can be a named location with its own alert contacts, and a pharmacy head can open all of them in one list and export a record for an inspection.
A SIM-based Vayu logger reports over the mobile network, so a store with no router can still be watched, and we confirm the choice after seeing the room.
Locations
Tell us what you need to monitor and where in Madurai. We will recommend the right loggers.