Digital Water Level Recorder (DWLR)
Continuous groundwater level monitoring engineered for 100% CGWA compliance with real-time telemetry.
Introduction
Groundwater monitoring built to meet strict CGWA guidelines.
Bulfro’s Digital Water Level Recorder (DWLR) provides continuous, autonomous groundwater level measurement in piezometers and borewells. Built around Central Ground Water Authority (CGWA) guidelines, it replaces manual sounder tapes with millimetre-precision piezoresistive pressure sensors that transmit data straight to the cloud or store it locally.
System Architecture
Continuous Piezometer Intelligence
Industrial groundwater abstraction permits in India require rigorous monitoring under Central Ground Water Authority mandates. Bulfro DWLR eliminates manual logging risks by recording aquifer recharge and drawdown cycles automatically.
A stainless steel vented piezoresistive transducer sits suspended downhole, immune to barometric pressure fluctuations, while the surface telemetry unit transmits logged records over 4G/GPRS directly to your centralized compliance dashboard.
Core Capabilities
Engineered for Reliable Aquifer Monitoring
Designed to provide uninterrupted groundwater telemetry even in the most remote industrial and agricultural terrains.
Millimetre Level Precision
High-accuracy hydrostatic level measurement with < ±0.25% of span precision across depths from 40 m to 300 m.
±1 mm ResolutionMulti-Band Wireless Telemetry
Integrated 4G / GPRS / GSM modem sends timestamped readings to the cloud. Fallback SMS alerts for threshold breaches.
4G / GPRS / NB-IoTDual Power Autonomy
Supplied with solar panel and high-capacity lithium backup offering over 30 days of continuous operation without sunlight.
Solar + 230V AC ReadyLocal Non-Volatile Storage
500 MB internal flash memory stores over 2 years of granular water level data. Download anytime via on-board USB port.
> 2 Years Data StorageIP68 Submersible Probe
Hermetically sealed 316L stainless steel sensor probe with Kevlar-reinforced polyurethane vented cable.
IP68 Probe / IP65 BoxEngineering Data
Technical Specifications
| Specification | Details |
|---|---|
| Measurement Parameter | Continuous Groundwater Level / Aquifer Depth |
| Measurement Principle | Piezoresistive Hydrostatic Pressure Column |
| Standard Depth Ranges | 0–40 m, 0–70 m, 0–100 m, 0–200 m, 0–300 m (custom up to 500 m) |
| Measurement Accuracy | < ±0.25% of full scale (vented atmospheric compensation) |
| Resolution | 1 mm (0.001 m) |
| Sensor Probe Material | Stainless Steel SS316L laser welded hermetic seal |
| Cable Type | Vented PUR jacket with Kevlar core & atmospheric breather filter |
| Telemetry & Connectivity | GSM / GPRS / 4G LTE / NB-IoT with RS-485 Modbus RTU |
| Local Data Storage | 500 MB non-volatile flash (> 2 years logging at 15-min intervals) |
| Data Download Interface | Direct USB interface for laptop/PC (CSV/Excel) |
| Power Supply Options | 10W/20W Solar Panel + Li-Ion rechargeable battery / 230V AC mains |
| Battery Autonomy | > 30 days continuous operation in complete darkness |
| Ingress Protection | Probe: IP68 (continuous immersion); Surface Enclosure: IP65/IP66 |
| Operating Temperature | -10°C to +60°C |
| Regulatory Compliance | CGWA NOC Guidelines Compliant, WPC approved telemetry |
DWLR Series Telemetry Models
| Model Code | Depth Range | Power Mode | Telemetry |
|---|---|---|---|
| BDWLR-S-100 | 0 – 100 m | Solar + Li-Ion | 4G / GPRS Telemetry |
| BDWLR-S-200 | 0 – 200 m | Solar + Li-Ion | 4G / GPRS Telemetry |
| BDWLR-G-300 | 0 – 300 m | 230V AC Grid + Battery | 4G / GPRS Telemetry |
| BDWLR-L-100 | 0 – 100 m | Lithium Internal | Non-Telemetry (500 MB USB) |
Media Gallery
Hardware & Field Deployments
Why Choose Bulfro DWLR
Built for Demanding Borewell & Piezometer Conditions
Field-proven engineering designed to eliminate maintenance headaches and ensure 100% data continuity.
Live Remote Telemetry
Automated GPRS/4G modem transfers groundwater readings directly to the Bulfro Cloud. Transmission intervals are fully configurable from 1 minute to 24 hours.
Fail-Safe Local Logging
In remote zones without cellular network, 500 MB of local memory stores over 2 years of readings safely. Retrieve records effortlessly via USB laptop connection.
Zero-Grid Solar Autonomy
Deploy anywhere without running AC cables. Monocrystalline solar charging combined with high-density lithium storage delivers uninterrupted 24/7 uptime.
Harsh Environment Resilience
Laser-welded 316L stainless steel transducer, Kevlar-reinforced cable, and IP65 UV-stabilized surface box survive extreme temperatures from -10°C to +60°C.
Product Configuration
Select the DWLR Setup for Your Borewell
Every aquifer monitoring point has unique depth, power, and cellular network conditions. Configure your DWLR unit to match your exact site specifications:
Depth Range
Data Transmission
Power Source
Mounting Kit
Complete Turnkey Compliance Deployment
Bulfro provides end-to-end DWLR delivery including site survey, piezometer sensor calibration, solar mounting installation, telemetry SIM configuration, and verified CGWA cloud connection.
Frequently Asked Questions
Frequently Asked Questions
Find direct answers to common questions regarding DWLR monitoring parameters, CGWA regulations, accuracy, and telemetry.
Yes. Bulfro’s Digital Water Level Recorder is fully engineered to meet Central Ground Water Authority (CGWA) guidelines. It features precision hydrostatic vented pressure sensors with accuracy better than ±0.25%, tamperproof telemetry transmission, and automatic data forwarding to the regulatory portal.
The sensor probe uses a hydrostatic piezoresistive pressure transducer suspended in the borewell. It measures the head of water above the sensor. A vented atmospheric tube in the cable cancels out barometric pressure changes, giving true water level with ±1 mm resolution.
The DWLR includes 500 MB of onboard non-volatile flash memory capable of saving over 2 years of readings at 15-minute intervals. If cellular connection drops, data is stored locally and uploaded automatically once signal is restored, or can be downloaded manually via the USB port.
Yes. The standard DWLR configuration includes a rugged monocrystalline solar panel and lithium-ion rechargeable battery pack. The system is engineered with ultra-low sleep power consumption, providing over 30 days of autonomous operation even during continuous cloudy or monsoon weather.
Bulfro provides DWLR sensor probes calibrated for standard water column depths of 40 m, 70 m, 100 m, 200 m, and 300 m, with custom deep-aquifer models supporting depths up to 500 m.
Data is accessible 24/7 through the secure Bulfro Aqua ESG cloud dashboard and mobile application. You can view real-time water levels, historical drawdown graphs, battery health, and download CGWA-formatted compliance reports in PDF and Excel formats.
Upgrade Your Piezometer to Digital Groundwater Intelligence
Meet all regulatory NOC obligations with zero guesswork. Share your borewell depth and site coordinates with Bulfro’s water engineering team for a customized DWLR proposal, turnkey installation, and direct CGWA portal integration.