Rotronic BL-1D Ambient Pressure and Dew Point Humidity Data Logger

A) Product Overview

The Rotronic BL-1D is a multi parameter data logger built to record barometric pressure, relative humidity, temperature, and calculated dew point with dependable long term performance. It is designed for applications where both climate conditions and ambient pressure need to be documented for quality control, audits, and traceability. The logger features pressure accuracy of plus or minus 3 mbar at 23°C, humidity accuracy of plus or minus 2 percent RH at 23°C in the 10 to 90 percent RH range, and temperature accuracy of plus or minus 0.3°C in the minus 20 to 70°C range.

The BL-1D stores up to 32,000 data records and supports flexible logging intervals from 30 seconds to 24 hours, making it suitable for both short studies and long monitoring periods. Its IP67 enclosure protects against dust and water, and the USB Mini interface allows straightforward connection to a computer for configuration and data download using HW4 Lite software. A two line LCD provides real time readings, while LED indicators provide quick visual confirmation of logging status and alarm conditions. The unit is powered by a CR2 lithium battery with up to one year battery life at a one hour logging interval.

B) Working Principle

The Rotronic BL-1D works by measuring pressure, humidity, and temperature at user defined intervals, then calculating dew point from the humidity and temperature values. All parameters are logged together to provide a complete environmental record.

1. Sensing: The device measures barometric pressure across 300 to 1100 mbar, relative humidity across 0 to 100 percent RH, and temperature across minus 30 to 70°C.

2. Calculation: Dew point is calculated internally using the measured humidity and temperature values.

3. Data logging: At each chosen interval from 30 seconds to 24 hours, the logger stores pressure, humidity, temperature, and dew point to internal memory, up to 32,000 records.

4. Display and indication: The LCD shows real time values and the LED indicators signal whether logging is active and whether alarm limits have been exceeded.

5. Download and reporting: Data is transferred to a PC through the USB Mini interface and processed in HW4 Lite software for viewing and report generation.

C) Why It Is Used

The BL-1D is used to capture accurate, time stamped records of environmental conditions where pressure, humidity, and temperature can affect product quality, storage stability, process reliability, and compliance documentation.

Common reasons to use BL-1D include:

• Ambient pressure and climate monitoring to document facility conditions over time

• Warehousing, cold rooms, and transport where conditions must be recorded for audits and traceability

• Meteorological and environmental logging when pressure trends are required alongside humidity and temperature

• Labs, cleanrooms, and controlled storage where monitoring supports quality procedures and investigations

• HVAC audits and facility documentation to validate performance of controlled spaces and identify deviations

D) Suitable Buyers

This data logger is suited for teams and industries that require reliable multi parameter monitoring and simple reporting.

Suitable buyers include:

• Quality assurance and compliance teams needing documented environmental records

• Warehouse and cold room operators monitoring storage conditions and tracking excursions

• Logistics and supply chain teams verifying transport and storage environments

• Laboratories and research facilities maintaining controlled conditions and documentation

• Cleanroom and controlled environment managers tracking room stability and audit readiness

• HVAC service teams and facility managers performing audits, verification checks, and maintenance documentation

FAQ

Q1: What does the Rotronic BL-1D measure?
It measures barometric pressure, relative humidity, and temperature, and it also provides calculated dew point.

Q2: Does the BL-1D calculate dew point?
Yes. Dew point is calculated internally from relative humidity and temperature.

Q3: Can it record pressure and humidity at the same time?
Yes. Pressure, relative humidity, temperature, and dew point are logged simultaneously at each interval.

Q4: What is the pressure measurement range and accuracy?
Pressure range is 300 to 1100 mbar. Accuracy is plus or minus 3 mbar at 23°C.

Q5: What is the humidity accuracy of the BL-1D?
Humidity accuracy is plus or minus 2 percent RH at 23°C in typical conditions.

Q6: What is the temperature range and accuracy?
Temperature range is minus 30 to 70°C. Accuracy is plus or minus 0.3°C.

Q7: How many records can the BL-1D store?
It can store up to 32,000 data records.

Q8: What logging intervals are available?
Logging interval can be set from 30 seconds to 24 hours.

Q9: How do I configure the logger and download data?
Configuration and data download are done via the USB Mini interface using HW4 Lite software.

Q10: Is the software included?
Yes. HW4 Lite is included for setup, download, and reporting.

Q11: What is the typical battery life?
Up to one year at a one hour logging interval using a CR2 lithium battery.

Q12: What is included in the box?
The BL-1D data logger, a CR2 battery, a calibration certificate, and a quick instruction sheet.