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
Dhruva – 4-Channel WiFi Logger for Multi-Point Monitoring
Dhruva is a 4 channel temperature data logger for multi-point monitoring. Four sensors connect to one Wi-Fi logger, so a room, chamber or storage area can be covered at several positions and seen on one screen.
- Measures
- 4 × temperature
- Temperature range
- −100 to +200 °C
- Sensor
- External probe
- Probe / cable
- 3 m included, extendable to 50 m
- Battery
- 7000 mAh
- Measures
- 4 × temperature + RH
- Temperature range
- −30 to +70 °C
- Humidity range
- 0–100 %RH
- Sensor
- External probe
- Probe / cable
- 3 m included, extendable to 10 m
- Battery
- 7000 mAh
Showing Dhruva
The name
Why We Call It Dhruva
Dhruva is the Pole Star, a symbol of stability and dependable reference.
Key features
Dhruva: 4 Channel Temperature Data Logger Features
Best for: Multi-point monitoring in rooms, chambers and storage areas.
- Four measurement channels in one Wi-Fi logger
- Dhruva: 4 temperature sensors, −100 to +200 °C, 3 m cable included and extendable to 50 m
- Dhruva Pro: 4 temperature + humidity sensors, 3 m cable included and extendable to 10 m
- 7000 mAh rechargeable battery with USB Type-C charging
- ±0.5 °C accuracy (±2 %RH on Pro)
Specifications
Dhruva Specifications
Each variant side by side, followed by the specifications shared by every Prithvi logger.
Swipe sideways to see every variant.
| Specification | Dhruva | Dhruva Pro |
|---|---|---|
| Measures | 4 × temperature | 4 × temperature + RH |
| Temperature range | −100 to +200 °C | −30 to +70 °C |
| Humidity range | — | 0–100 %RH |
| Sensor | External probe | External probe |
| Probe / cable | 3 m included, extendable to 50 m | 3 m included, extendable to 10 m |
| Battery | 7000 mAh | 7000 mAh |
| Common to all variants | ||
| Accuracy | ±0.5 °C (±2 %RH on RH models) | |
| Resolution | 0.1 °C (0.1 %RH) | |
| Storage | Up to 1,00,000 records | |
| Logging interval | 1–60 min (configurable) | |
| Cloud sync interval | 1–60 min (configurable) | |
| Battery life | About 3 months at a 10-minute logging interval | |
| Charging | Universal USB Type-C; rechargeable Li-ion battery | |
| Connectivity | Wi-Fi, plus offline data download via PC software. GSM and LoRa versions available on request. | |
Loggers can be calibrated by our parent lab through our Calibration service.
Applications
Where Dhruva Is Used
Industries where we recommend this series, and what it typically monitors there.
Pharmaceutical
- Medicine storage rooms
- Drug warehouses
- Stability areas
Data Centres & Server Rooms
- Server room temperature and humidity
- Overheating prevention
- Network and UPS rooms
Chemical
- Chemical storage rooms
- Raw-material warehouses
- Sensitive processing areas
Monitoring
Cloud Monitoring Dashboard & Mobile Alerts
Every Dhruva works with the monitoring dashboard, so readings, alerts and reports are in one place.
- Real-time alerts via email, SMS, mobile app and dashboard
- Multi-level escalation (Level 1 → 2 → 3) if an alert isn't acknowledged
- Alert acknowledgement with root-cause and corrective-action notes
- Role-based user access and a complete audit trail (supports 21 CFR Part 11, GMP and GDP compliance)
- Location hierarchy for multi-site monitoring (organisation → site → room → device)
- Reports as graph, table or both; export to PDF, Excel and CSV
- Calibration and mapping reports stored against each device and room, ready for audits
- Substitute device while a logger is away for calibration, with its data merged back so there are no gaps
- Consignment (in-transit) monitoring with journey reports
- Door-open monitoring and hooter alarms
Accessories
Accessories
Accessory compatibility is confirmed by our team when we prepare your quote.
External Hooter with Door Sensor
Wi-Fi hooter giving instant audible alarms on any excursion. Supports up to 4 door sensors, with an alarm if a door stays open beyond the set time. One hooter can serve multiple loggers. Cable length configurable. 12 V DC adapter, 12 V external hooter. Logs door open/close and excursion events.
Charging Dock
Charges replaceable logger batteries so a charged spare is always ready, minimising downtime.
FAQ
Dhruva Questions
Answers to what buyers ask most about this series.
What is the difference between Dhruva and Dhruva Pro?
Dhruva has four temperature sensors covering −100 to +200 °C. Dhruva Pro has four temperature + humidity sensors covering −30 to +70 °C and 0–100 %RH.
Why use one 4-channel logger instead of four single loggers?
One device covers four positions, with one battery to charge and one Wi-Fi connection to set up, and all four readings appear together.
What if I need more than four points?
Veer covers 10 channels and Virat covers 16 channels from a single logger.
Related
Compare with Other Series
- 2 channels
- 10 channels
Veer
10 × temperature, or 10 × temperature + humidity (Pro)
Ten-channel WiFi logger for warehouses and multi-zone facilities.
- Range
- −100 to +200 °C · Pro: −30 to +70 °C, 0–100 %RH
- 16 channels
Virat
16 × temperature, or 16 × temperature + humidity (Pro)
Sixteen-channel WiFi logger for large facilities.
- Range
- −100 to +200 °C · Pro: −30 to +70 °C, 0–100 %RH
Get Solution
Ask About Dhruva
Tell us where it will be used and how many you need. We'll confirm the right variant and send you a clear, itemised quote.