Rotronic HL-1D Humidity and Temperature Data Logger
Rotronic HL-1D is a compact IP67 humidity and temperature data logger with ±2% RH and ±0.3°C accuracy, 32,000-point memory, LCD display, and USB-Mini connection for easy setup and reporting via HW4-Lite software. Ideal for cold-chain logistics, pharmaceuticals, storage, and environmental monitoring.
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A) Product Overview
The Rotronic HL-1D is a compact, robust humidity and temperature data logger designed for continuous monitoring in logistics, cold chain, pharmaceuticals, storage areas, and environmental applications. It measures relative humidity, temperature, and calculated dew point and stores up to 32,000 data points for reliable reporting and traceability. With an IP67 protection rating, a 2-line LCD display, and a wide operating range of –30 to 70°C and 0 to 100% RH (non-condensing), the HL-1D is suitable for both field and indoor monitoring. Data setup, download, and report generation are handled through the USB-Mini interface using HW4-Lite software, enabling straightforward configuration and documentation.
Key highlights include ±2% RH accuracy at 23°C (10–90% RH), ±0.3°C temperature accuracy (–20 to 70°C), selectable logging intervals from 30 seconds to 24 hours, and MIN/MAX/AVG functions for quick checks. Visual status and alarms are supported via LED indications. The logger operates on a CR2 battery with approximately 1-year battery life at a 1-hour logging interval.
B) Working Principle
The Rotronic HL-1D works by sensing relative humidity and temperature and saving the readings at a user-defined logging interval. From these measured values, the device calculates dew point internally (calculated using the WMO method) and stores the results along with the recorded RH and temperature.
Measurement: The logger continuously measures RH (0–100% RH) and temperature (–30 to 70°C).
Computation: Using the measured RH and temperature values, it calculates dew point internally.
Logging: At each selected interval (30 sec to 24 h), values are stored in memory (up to 32,000 lines).
Display & Indication: The LCD updates every 5 seconds to show key readings, while LEDs indicate logging status and alarms.
Data Retrieval: Logged data is downloaded through the USB-Mini interface and analyzed or exported using HW4-Lite software for reporting and recordkeeping.
C) Why It Is Used
The HL-1D is used to ensure environmental conditions remain within acceptable limits and to provide documented proof of those conditions over time. It is especially valuable in applications where humidity and temperature directly affect product quality, compliance, and storage safety.
Common reasons to use HL-1D include:
Cold-chain and logistics monitoring to track environmental conditions during storage and movement.
Pharmacies and pharmaceutical production to document humidity and temperature conditions for controlled environments.
Environmental storage monitoring for sensitive materials, packaged goods, and controlled stock rooms.
HVAC room/warehouse checks to confirm stable climate conditions in production areas, stores, and warehouses.
Dew point tracking where condensation risk must be monitored using calculated dew point based on RH and temperature.
D) Suitable Buyers
This product is suitable for buyers who need reliable humidity and temperature logging, strong protection (IP67), and simple reporting via USB software.
Suitable buyer profiles:
Cold-chain logistics companies managing temperature- and humidity-sensitive shipments or storage.
Pharmaceutical manufacturers and QA teams needing documented monitoring in production and storage areas.
Pharmacies and medical distributors maintaining stable conditions for stored inventory.
Warehouse and facility managers monitoring storage rooms, stock areas, and environmental conditions.
HVAC contractors and maintenance teams performing verification checks in controlled spaces.
Quality assurance and compliance teams requiring logging records, reports, and traceability.
FAQ
Q1: What does the Rotronic HL-1D measure?
It measures relative humidity and temperature and also provides a calculated dew point.
Q2: Does the HL-1D support dew point measurement?
Yes. Dew point is calculated internally from RH and temperature values (WMO method).
Q3: What is the humidity accuracy of the HL-1D?
Humidity accuracy is ±2% RH at 23°C (10–90% RH).
Q4: What is the temperature accuracy of the HL-1D?
Temperature accuracy is ±0.3°C in the range –20 to 70°C.
Q5: How much data can the HL-1D store?
It can store up to 32,000 lines (data points).
Q6: What logging intervals are available?
The logging interval is adjustable from 30 seconds up to 24 hours.
Q7: How do I configure and download data from the HL-1D?
Configuration and data download are done via the USB-Mini interface using HW4-Lite software.
Q8: Is the software included?
Yes. HW4-Lite is included for configuration, data download, and reporting.
Q9: Is the HL-1D suitable for cold-chain logistics?
Yes. It operates from -30 to 70°C and has IP67 protection, making it suitable for logistics and storage environments.
Q10: What is the battery type and battery life?
It uses 1 × CR2 battery and lasts approximately 1 year at a 1-hour logging interval.
Q11: What comes in the box with the HL-1D?
The box includes the HL-1D data logger, a CR2 battery, calibration & function certificate, and a quick instruction manual.