BluNODE CL
Current Loop Monitor with 4‑20mA Analog Inputs
$1,500
Industrial monitoring with precision 4‑20mA analog capability. BluNODE CL combines comprehensive base monitoring (20 temperature, 40 Modbus, 4 pulse, 4 CT inputs) with four channels of 4‑20mA current loop inputs—perfect for pressure transducers, flow transmitters, and industrial instrumentation.
Don't need analog? See BluNODE | Also need differential pressure? Add DP Board
Base Monitoring + Analog Precision.
BluNODE CL delivers everything in the base BluNODE—20 temperature sensors, 40 Modbus devices, 4 pulse inputs, and 4 current transformers—plus four channels of 4‑20mA current loop inputs for precision industrial sensors.
Perfect for commissioning agents, MEP engineers, and facility professionals who need to monitor pressure, flow, level, or other parameters using industry‑standard 4‑20mA transmitters.
Key Benefits
Where BluNODE CL Excels
Industrial Process Monitoring Monitor pressure, flow, level, and other process parameters using precision 4‑20mA sensors in manufacturing, processing, or industrial facilities.
Commissioning & Performance Verification Capture high‑resolution performance data using analog sensors to validate system operation and verify equipment meets design specifications.
Advanced Water & Energy Systems Track pressure, flow, and thermal performance using industrial‑grade 4‑20mA transmitters for detailed system analysis and optimization.
Building Automation Integration Integrate 4‑20mA sensors with temperature, pulse, and Modbus monitoring for comprehensive facility oversight.
Professional M&V Projects Deploy for Measurement & Verification studies requiring precise analog instrumentation and professional‑grade data accuracy.
BluNODE CL combines precision analog monitoring with the comprehensive sensor suite of the base BluNODE—giving you complete flexibility to monitor any building system.
4× 4‑20mA Analog Inputs
Industry‑standard current loop inputs for pressure transducers, flow meters, level sensors, and industrial transmitters.
20× Temperature Inputs
Thermistors, RTDs, or thermocouples for comprehensive thermal monitoring.
4× Pulse Inputs
Dry contact or reed switch pulse counting for water, gas, or electric meters.
4× Current Transformer Inputs
Monitor electrical consumption at the circuit or equipment level.
40× Modbus Sensors
RS‑485 Modbus RTU connectivity for existing sensors and building automation equipment.
Technical Specifications
BluNODE CL (Current Loop)
| 4-20mA Analog Inputs (CL Board) | |
| Analog Input Channels | 4 dedicated 4-20mA current loop inputs |
| Input Range | 4-20mA industry-standard current loop |
| Resolution | 16-bit analog-to-digital conversion |
| Accuracy | ±0.1% of full scale |
| Sensor Power Supply | 24VDC available for powering 4-20mA transmitters |
| Compatible Sensors |
|
| Temperature Monitoring (Base Board) | |
| Temperature Inputs | Up to 20 temperature sensors |
| Sensor Types | Thermistors, RTDs, thermocouples |
| Accuracy | ±0.5°C (sensor dependent) |
| Pulse Monitoring (Base Board) | |
| Pulse Inputs | 4 pulse counter channels |
| Input Types | Dry contact, reed switch |
| Maximum Pulse Rate | Up to 100 pulses per second per channel |
| Power Monitoring (Base Board) | |
| CT Inputs | 4 current transformer channels |
| Measurement Range | 0-100A (CT dependent) |
| Applications | Circuit-level or equipment-level electrical monitoring |
| Modbus Integration (Base Board) | |
| Modbus Sensors | Up to 40 Modbus devices |
| Protocol | Modbus RTU over RS-485 |
| Baud Rate | 9600-115200 bps (configurable) |
| Network Connectivity | |
| Wireless Options |
|
| Wired Options | RS‑485, Ethernet (optional) |
| Network Integration | Standalone or integrated with BluCORE |
| Data Processing & Storage | |
| Processing | Local edge computing and data logging |
| Memory | Onboard storage for continuous data logging |
| Logging Interval | Configurable from 1 second to hourly (or longer) |
| Offline Operation | Fully functional without internet connection |
| Power | |
| Input Voltage | 12‑24VDC or 100‑220VAC (depending on model) |
| Power Consumption | Low‑power design for extended battery operation |
| Battery Life | Up to 10 years (in low‑power configurations) |
| Physical Specifications | |
| Enclosure | Industrial‑grade, ruggedized housing |
| Rating | NEMA 4X / IP65 (indoor/outdoor rated) |
| Mounting Options | Wall‑mount, pole‑mount, DIN rail, magnetic mount |
| Operating Temperature | ‑20°C to 60°C (‑4°F to 140°F) |
| Security | |
| Data Encryption | AES‑256 encryption for data transmission |
| Secure Communication | TLS/SSL encrypted wireless transmission |
| Software & Interface | |
| Configuration | Web‑based interface or BluCORE integration |
| Data Access | Local retrieval or remote access (when connected) |
| Alerts | Configurable thresholds and notifications |
| Export | CSV, Excel, API integration |
| Additional Expansion Capability | |
| DP Expansion Board | 4× differential pressure sensors (+$700) can be added for HVAC diagnostics |
| Certifications & Compliance | |
| Standards | FCC, CE, UL certified |
| Environmental | RoHS compliant |
Add Differential Pressure Monitoring
BluNODE DP Expansion (+$750) Add four built‑in Sensirion SDP810 differential pressure sensors for HVAC airflow diagnostics—combine analog capability with HVAC diagnostics in one device.
Total with both expansions: $2,200 (Base $1,000 + CL $500 + DP $750)
Professional Monitoring. Complete Integration.
Standalone Operation Deploy BluNODE CL as an independent data logger for targeted monitoring with analog sensor capability.
Networked with BluCORE Connect multiple BluNODE CL devices to BluCORE for centralized data aggregation, analysis, and facility‑wide intelligence.
Integrated with BluPULSE Add BluPULSE pulse readers to extend your pulse metering capability beyond the four built‑in inputs.
Mixed Deployment Combine BluNODE CL (for analog applications) with BluNODE and BluNODE DP devices to optimize costs across your facility.
BluNODE CL Hardware
BluNODE precision data logger with CL expansion board pre‑installed
Power supply and cables
Mounting hardware
Antenna (for wireless configurations)
Quick‑start guide
What’s Included
Software & Interface
Local data logging and storage
Integration with BluCORE dashboard (when networked)
Historical data access and export
Alert and notification capabilities
API access for custom integrations
Support Options
The Starter ($500) — Sensor selection and hardware design guidance
The Pro Setup ($100/mo) — Ongoing configuration and remote support
The Expert Edge ($250/mo) — Senior expert consultation for advanced deployments
Need Help Selecting Sensors?
BluNODE CL supports 4‑20mA analog sensors plus the full suite of base BluNODE sensors. Our support plans include expert guidance to help you select the right sensors for your monitoring application.
BluNODE CL — $1,500
Ready to Deploy?
Purchase BluNODE CL for immediate deployment with 4‑20mA analog capability, or request a quote for multiple units.
Don't need 4‑20mA analog inputs?
Save $500 with BluNODE base—perfect for temperature, pulse, Modbus, and CT monitoring.
Also need differential pressure monitoring?
Add the DP expansion board for built‑in HVAC differential pressure sensors.
Planning a larger deployment?
Our team can help you design the optimal BluNODE configuration for your facility's monitoring needs.
Volume Pricing Available
Ordering multiple BluNODE devices or planning a campus‑wide deployment? Contact us for volume pricing and deployment consultation.
FAQs
What's the difference between BluNODE CL and BluNODE?
1
BluNODE CL adds four channels of 4‑20mA analog inputs to the base BluNODE. If you need to connect industrial sensors like pressure transducers or flow transmitters, choose BluNODE CL. If you only need temperature, pulse, Modbus, and CT monitoring, the base BluNODE ($1,000) is sufficient.
Can I add the CL board to BluNODE later?
2
Yes! The CL expansion board can be purchased separately ($500) and installed by the customer. However, if you know you'll need analog capability, we recommend BluNODE CL—same total price, pre‑installed and factory tested.
How many 4‑20mA sensors can BluNODE CL support?
3
BluNODE CL has four dedicated 4‑20mA analog input channels, plus all the base BluNODE capabilities (20 temperature, 4 pulse, 4 CT, 40 Modbus).
Can I add differential pressure monitoring to BluNODE CL?
4
Yes! You can add the DP expansion board ($700) to BluNODE CL for complete analog and differential pressure capability in one device.
Can BluNODE CL operate without BluCORE?
5
Yes. BluNODE CL functions as a standalone data logger with local storage and processing. BluCORE integration is optional for centralized monitoring.
We offer three support plans—The Starter, The Pro Setup, and The Expert Edge—covering everything from initial setup to ongoing optimization.
What support is available after purchase?
6
Ready to Add Analog Monitoring to Your Facility?
See how BluNODE CL can deliver precision 4‑20mA analog capability plus comprehensive base monitoring for your building systems.