Universal LCD Digital Light Meter HT603 – Accurate Luxmeter with Temperature and Humidity Measurement
Are you looking for a reliable and accurate light measurement tool that will meet both professional standards and the needs of home craftsmen? The HT603 Universal LCD Digital Light Meter (SKU: HT603) is a premium luxmeter designed for quick, easy and extremely accurate measurement of light intensity in a variety of environments. This versatile device not only measures light, but also functions as a thermometer and hygrometer, making it an indispensable tool in the electrical industry, photography, agronomy, and in monitoring living and working spaces.
Thanks to its robust construction, advanced technology and 180-degree rotatable probe, this digital light meter ensures a superior user experience and long service life. Whether you are optimizing lighting in an office, greenhouse or photography studio, the HT603 will provide flawless results.
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Why choose the HT603 digital light meter? Key benefits
An investment in a quality light meter quickly pays off with improved energy efficiency, better working conditions and optimal plant growth. Discover the key benefits of the HT603 device:

3-in-1 versatility: In addition to precise light measurement, the device also simultaneously measures air temperature and relative humidity.
High accuracy and fast response: The built-in powerful microchip provides instant results with minimal deviation, which is key for professional measurements.
Extreme flexibility: The 180-degree rotating probe allows for easy pointing towards the light source without moving the entire device.
Robust and durable construction: The housing made of high-quality ABS plastic offers high resistance to drops, dust and water ingress, allowing use in demanding industrial conditions.
Easy to use: The clear, illuminated LCD display allows easy reading of data even in complete darkness or bright sunlight.

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Versatile use in all industries
The HT603 universal digital lux meter is designed for a wide range of applications. It can accurately measure the light intensity emitted by various light sources, such as:

Fluorescent and energy-saving lamps
Halogen bulbs
Modern LED lights
Car headlights
Professional photography lights and flashes

Due to the ability to measure humidity (0% ~ 99.9% RH) and temperature (-20°C to +60°C), this device is also ideal for climate control in warehouses, greenhouses, museums, schools, offices and residential buildings.
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Technical features and specifications
The HT603 light meter combines advanced technology and ergonomic design. See the detailed technical specifications of the device below:



Function / Parameter
Measuring range and properties




Light measurement range
0~100000 LUX / 0~10000 FC


Light measurement accuracy
±(3.0% + 5)


Temperature range
-20°C ~ 60°C (-4°F ~ 140°F)


Temperature accuracy
±1.5°C


Humidity range
0~100%RH


Humidity accuracy
±5.0% RH (expressed as ±5.0°C)


Data Hold
Yes


Screen lighting
Yes


MAX/MIN function
Yes


Automatic shutdown
Yes (for energy saving)


Low battery indicator
Yes


Power supply
3x AAA DC 1.5V battery



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Smart features for worry-free work
The HT603 is designed with the user in mind. It offers a number of features that make everyday work in the field or in the laboratory easier:

Switch between units: Easily switch between European metric units (LUX) and imperial units (FC - foot-candle) with a simple push of a button.
Probe protection: A special protective cover protects the sensitive optical probe from scratches, dust and other mechanical damage during transport.
Energy saving: The auto-off feature ensures that the device turns off after a certain period of inactivity, thereby extending battery life.
Ergonomic buttons: Intuitively arranged buttons allow for easy one-handed operation of the device.

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Frequently Asked Questions (FAQ)
How do I switch between LUX and FC units on the HT603?
Switching between LUX (lux) and FC (foot-candle) measurement units is extremely easy. There is a dedicated button on the front panel of the device, with which you can instantly change the displayed unit on the illuminated LCD screen at any time during the measurement.
What is the advantage of a 180-degree rotating probe?
The rotating probe allows for extreme flexibility in your work. Instead of having to turn the entire device into awkward positions (making the screen difficult to read), you simply rotate the probe towards the light source while keeping the screen facing directly towards you.
Does the device include features for monitoring high and low values?
Yes, the HT603 digital light meter is equipped with a MAX/MIN function. This function allows you to easily record and display the highest and lowest measured light, humidity or temperature values over a certain period of time during a measurement.


Responsible persons:
HABOTEST - INNPRO Robert Błędowski Sp. z o. o., Rudzka 65c, 44-200 Rybnik, Poland, contact@innpro.eu, (+48) 696323914
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Turn on the meter.
• Place the meter in the location where you want to check the light.
• The meter will display accurate light measurements in lux or foot-candle units on a digital LCD display.

Useful tips for work:
• Before use, check whether the meter is suitable for your needs.
• The meter is suitable for measuring ambient light.
• When using, be careful not to damage the meter or yourself.
• After use, turn off the meter and store it in a dry place.

Warnings:
• ⚠️ Do not expose the sensor to water or moisture.
• ⚠️ Do not use a damaged device.
• ⚠️ Do not disassemble or modify the device.
• ⚠️ Do not point the sensor directly at very strong light sources if this could exceed the measurement range.
• ⚠️ Keep batteries out of the reach of children.
• ⚠️ Measurement results are informative and depend on the position and measurement conditions.

Same summary

The universal LCD digital light meter is a versatile choice for home users and hobbyists who want to easily check the lighting conditions indoors or outdoors. It is useful for monitoring the illumination of work areas, preparing green areas or maintaining an optimal lighting environment for plants. Although the versatility facilitates widespread use, for precise professional measurements it is recommended to choose a specialized model with a higher level of accuracy. The larger LCD screen allows for clear and quick interpretation of results, but users should check before use whether the device is adequately protected for work in humid or very dusty environments.

Recommendation source: Enaa guides and team experiences.

User view

This type of meter is typically used by individuals who want to monitor light indoors or in the garden, especially in situations where a quick assessment of brightness is useful – for example, when setting up aquariums, growing plants, or creating a pleasant ambiance in a living room. The product also often comes in handy for basic renovations or determining the optimal light spot for home photography.

Users appreciate the reliability and simplicity of Habotest devices, which are renowned for their affordable yet robust tools for everyday household tasks and field solutions.

Why buy at Enaa

At Enaa, we provide expert descriptions and advice to make it easier to compare light detectors, and our offer is regularly updated with renowned brands with proven products. Users especially appreciate the wide selection in the detector category, which allows finding a solution for almost any home or hobby need.

Answers to frequently asked questions

Is the meter suitable for measuring light both indoors and outdoors?

Yes, the universal LCD digital light meter can be used both indoors and outdoors, but we recommend that you check that your device has adequate protection against moisture and dust when using it outdoors.

What does the value displayed on the LCD screen mean?

The displayed value represents the current light level, usually expressed in lux (lx), which allows the user to estimate the illumination of a given space or area.

Can the device also be used for professional measurements?

The meter is perfectly suitable for basic and quick measurements, but for more demanding, professional areas, we recommend using more advanced models with higher accuracy and additional certificates.

What to do if the meter shows unusually low or high values?

We recommend that you check the surroundings for the presence of sources that could interfere with the light measurement (reflections, shadows, unforeseen light sources) and, if necessary, repeat the measurements at several different points.

Does the meter require any special maintenance?

The device does not require any special maintenance, but it is recommended to store it in a dry place and clean the lens and screen regularly to ensure the accuracy of the results.

Description updated: April 2026