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Lutron HT-306 High-Precision All-in-One Humidity/Temperature Meter:
The Lutron Model HT-306 is an intelligent, professional, and pocket-sized instrument designed to provide highly accurate measurements of key environmental conditions. This all-in-one meter combines three essential parameters: Humidity, Temperature, and calculated Dew Point, making it suitable for professional applications.
The HT-306 is built using a custom one-chip microprocessor LSI circuit to assure maximum possible accuracy and features, and it is certified with ISO-9001, CE, and IEC1010 standards. The meter includes a built-in probe for easy operation.
Core Measurement Capabilities:
The meter specializes in triple measurement, providing ambient Relative Humidity, Temperature, and Dew Point.
• Exceptional Resolution: The device achieves a high resolution of 0.01 %RH for humidity readings and 0.01 degree for temperature readings.
• Dew Point Calculation: The Dew Point display value is automatically calculated based on the simultaneous Humidity and Temperature measurements.
• Fast Response: The humidity measuring response time is fast, typically taking 5 to 30 seconds to reach 85% of the final reading value.
Advanced Functionality and Display:
The user interface is designed for professional ease of use, featuring just a few panel buttons.
• Dual Display: The large LCD (44 mm x 29 mm) features two displays, allowing the humidity and temperature values to be shown simultaneously for easy readout.
• Data Handling: The meter includes a Record function that tracks the Maximum (Max.) and Minimum (Min.) readings, which can be easily recalled. A Data Hold function is available for freezing the desired value on the display.
• Data Logging: The HT-306 supports both manual and auto manual data logging.
• PC Interface: An RS-232 PC serial interface is built in for data output, allowing connectivity to a computer for advanced monitoring and analysis (optional accessories are required for cable connection and software).
• Automatic Compensation: It features automatic temperature compensation specifically for the humidity function.
Construction and Power:
The HT-306 is designed for portability and field use.
• Design: The meter utilizes a heavy-duty and compact housing case, making it easy to carry out and operate.
• Dimensions: The main instrument dimensions are 204 x 60 x 33 mm (8.0 x 2.4 x 1.3 inch).
• Weight: The approximate weight is 202 grams (0.44 LB), including the battery.
• Power Management: It operates on a standard 006P DC 9V battery (Alkaline or Heavy duty type). The unit includes an auto shut-off function to save battery life, and a built-in low battery indicator. A DC 9V power adapter input socket is also included for extended use.
Technical Specifications:
|
Function
|
Range
|
Resolution
|
Accuracy (23 ± 5 °C)
|
|
Humidity (%RH)
|
10 % to 95 % R.H. (Probe range: 0 to 95 %RH)
|
0.01 % R.H.
|
>= 70% RH: ± (3% reading + 1% RH)
|
|
< 70% RH: ± 3% RH
|
|||
|
Temperature (°C)
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0 to 50 °C
|
0.01 degree
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± 0.8 °C
|
|
Temperature (°F)
|
32 to 122 °F
|
0.01 degree
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± 1.5 °F
|
|
Dew Point (°C)
|
-25.3 to 48.9 °C
|
0.01 °C
|
Calculated value*
|
|
Dew Point (°F)
|
-13.5 to 120.1 °F
|
0.01 °F
|
Calculated value*
|
|
Response Time
|
N/A
|
N/A
|
5 to 30 seconds typically (85% reading value)
|
|
Sampling Time
|
N/A
|
N/A
|
Approx. 0.8 second
|
|
Operating Temp.
|
N/A
|
N/A
|
0 to 50 °C (Main Instrument)
|
|
Operating Humidity
|
N/A
|
N/A
|
Less than 85% R.H. (Main Instrument)
|
|
Circuit
|
N/A
|
N/A
|
Custom one-chip microprocessor LSI circuit
|
|
Data Output
|
N/A
|
N/A
|
RS 232 PC serial interface
|
|
Power Current
|
N/A
|
N/A
|
Approx. DC 4.6 mA
|
*Note: The Dew Point accuracy is the sum accuracy value of Humidity & Temperature measurement.
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