HOBO® HVAC Monitoring Kit

A Bluetooth data logger, 50 Amp Current (AC) sensor/transformer, and three (3) temperature probes to measure and transmit HVAC data wirelessly.

• One 4-channel analog data logger

• Two 20 ft. self-describing temperature probes
• One 50 ft. self-describing temperature probe
• One 50 amp split-core current transformer
• Bluetooth communication for wireless data offload
• 16 bit resolution for highly accurate measurements
• Stores 1.9 million measurements for longer deployments between offloads
• Self-Describing technology for quick, easy setup
• Locking jack to ensure sensor is connected and stays connected
• Audible and visual LCD screen alarms if a sensor becomes unplugged or a reading exceeds set thresholds

Ideal for analyzing the operational performance of commercial HVAC systems and identifying opportunities to improve energy efficiency, this set of products includes a Bluetooth data logger, three temperature probes, and one AC current sensor. This easy-to-deploy, comprehensive monitoring solution streamlines analysis and assessments.

HVAC Performance monitoring kit sensor configuration:
Channel 1: temperature sensor probe attached to thermostat to monitor system's response to indoor thermal conditions
Channel 2: temperature probe deployed at HVAC outlet to measure discharge and provide data on conditioned air delivery
Channel 3: temperature probe connected to rear of unit to asses return air and assess reconditioning performance
Channel 4: AC current sensor connected to a split-core current transformer (CT) to monitor the compressor’s electrical load during cooling cycles and correlate system operation to power consumption

Combining these sensors and locations provides a comprehensive profile of the HVAC system's thermal and electrical behavior, giving users an invaluable tool for data-driven analysis to optimize performance and reduce energy consumption.

The Bluetooth-enabled wireless data logger delivers convenient access to data using a mobile device or Windows computer using the free HOBOconnect® app. Within a 100' range, users can wirelessly configure the logger, download and view data in real-time graphs, check operational status, set alarm notifications, and share data files; all without the need for dedicated equipment beyond a smartphone, tablet, or laptop. This flexibility streamlines data collection and simplifies field deployment, making it ideal for energy audits, HVAC diagnostics, and long-term system monitoring.

4 Channel Analog Logger
Operating range: −20 to +70°C (−4 to +158°F)
Radio power: 1 mW (0 dBm)
Transmission range: approx. 30.5 m (100') line-of-sight
Wireless data standard: Bluetooth low energy (Bluetooth Smart)
Logging rate: 1 second to 18 hours
Logging modes: fixed interval (normal, statistics) or burst
Memory modes: wrap when full or stop when full
Start modes: immediate, push-button, date & time, or next interval (push-button Restart mode)
Stop modes: memory full, push-button, date & time, or set logging period
Time accuracy: ±1 minute per month at 25°C (77°F)
Full memory download time: approx. 4 to 15 minutes

Self-Describing Air/Water/Soil Temperature Sensor (qty 2 at 20' and qty 1 at 50')
Measurement range: −40 to +50 °C (−40 to +122 °F) in water; −40 to +100 °C (−40 to +212 °F) in air
Accuracy: ±0.15 °C from 0 to 50 °C (±0.27 °F from 32 to 122 °F), insert probe 2.3 cm (0.9") minimum; see Plot A
Resolution: 0.002° at 25 °C (0.003° at 77 °F)
Drift: <0.1 °C (<0.2 °F) per year
Response time: Air: 2 minutes typical to 90% in air moving 1 m/s (2.2 mph); Water: 30 seconds typical to 90%
Operating range: Sensor tip and cable immersion in fresh water up to 50 °C (122 °F) for 1 year
Probe housing: Copper-plated sensor tip
Probe dimensions: 5.1×33 mm (0.2×1.3")

Self-Describing Current Transformer Sensor
Current range: 5 to 50 amps AC
Response time: 200 milliseconds (from 10% to 90% of amplitude)
Input current: AC current, sine wave, single-phase 50/60Hz, load power factor 0.5 to 1.0 lead or lag
Accuracy: ±2.1% of full scale (includes logger accuracy)
Output: 0 to 2.5V DC
Voltage rating: 600V AC
Material: molded plastic housing for indoor use per UL508
Cable: 1.8 m (6')
Dimensions: 71×79×36 mm (2.8×3.1×1.4"); 28×0 mm (1.1×0.8") window

Delivery information: The HVAC monitoring kit includes: 4-channel analog logger, tie wraps, two AAA 1.5 V alkaline batteries (installed), two 20' Self-Describing temperature probes, one 50' Self-Describing temperature probe, and one 50 amp split-core current transformer.

Caution: Requires a compatible mobile device or Windows computer and the HOBOconnect® app. MX DATA plans for each logger to get cloud storage and access to the powerful tools of LI-COR Cloud® IoT software (formerly HOBOlink) sold separately.