Solar Power Meter ( HTC – LX-107 )

Description

HTC LX‑107 Solar Power Meter – Professional Solar Radiation Measurement Device

The HTC LX‑107 is a precision solar power meter built for extremely accurate measurement of solar irradiance. Engineered for research labs, solar energy professionals, building inspectors, and automotive glazing evaluation, this compact instrument delivers reliable real‑time readings in both watts per square meter (W/m²) and BTU/(ft²·h). With features like peak‑hold, data‑hold, auto‑range, and even a digital compass, it simplifies solar testing and compliance checks for anyone working with solar intensity and window transmission.

Real-Time Solar Power and Light Transmission Measurement

The LX‑107 is primarily designed to measure solar power density expressed in W/m² or BTU/(ft²·h). It is ideal for assessing sunlight penetration through glass, evaluating solar film or window coatings, and optimizing solar panel placement and orientation. Its ability to handle a maximum measurable range of approximately 2,000 W/m² (or 634 BTU/(ft²·h)) makes it suitable for most practical solar applications, including car window insulation testing, agricultural light assessment, and basic meteorological observations .

Multiple Display Modes: Peak Hold, Min/Max, Data Hold

Equipped with intuitive controls, the LX‑107 supports a variety of display modes: maximum, minimum, and peak‑hold readings help capture transient light conditions such as passing clouds or varying sunlight angles. A data‑hold function allows the user to freeze a reading for documentation. These features streamline field testing by preventing missed values during outdoor measurements or dynamic conditions.

Dual Units with Auto‑Range Function

Users can choose between two units—W/m² or BTU/(ft²·h)—with a dedicated switch for easy toggling. The auto‑range function automatically adjusts the most suitable measurement scale, preventing overload conditions and ensuring accurate data across the full measurement span. If the device approaches the upper limit, it displays an overload symbol indicating readings are beyond measurable range.

Built‑In Compass for Directional Assessment

A standout feature of the LX‑107 is its built‑in digital compass, which helps users orient the device precisely toward the sun or specific window surfaces. This directional guidance is valuable for solar panel alignment, evaluating shading effects, and accurately characterizing window film performance under varied incident angles.

Superior Display and User Interface

The instrument features a 3½‑digit LCD display capable of up to 1,999 counts. Its large, high‑contrast format ensures visibility even in bright ambient light. Icons on the display clearly indicate mode status, unit type, and hold functions, making for a more intuitive measurement workflow. The light‑sensitive display and fast 0.25‑second sampling time support rapid readings in dynamic illumination environments.

Compact, Portable and Rugged Design

The LX‑107 is built for field conditions, with a compact profile (approximately 100 × 60 × 27 mm) and lightweight construction (around 300 g). Its durable housing protects against bumps and frequent transport. The device is small enough for handheld use or to fit easily into tool bags for outdoor inspections or repeated on‑site measurements

Long Battery Life and Energy Efficiency

Powered by a standard 9 V battery (IEC 6F22 / NEDA 1604 / JIS 006P), the LX‑107 offers up to 100 hours of continuous use. Its auto‑power‑off feature helps conserve energy by shutting down the meter after inactivity. This efficiency makes it well suited for prolonged field work or inspection routines where charging or replacements may be inconvenient

Certified Safety and Environmental Compliance

The LX‑107 conforms to international safety standards including EN 61010‑1 for measuring instruments and electromagnetic compatibility (EN 61326 including amendments). It is designed to operate reliably between 5 °C and 40 °C with up to 80% relative humidity, and can be stored between −10 °C and 60 °C at up to 70% RH—a robust instrument built for varying environments

Common Applications and Benefits

• Solar Energy Assessment: Accurately measure sunlight intensity for solar panel placement and efficiency studies.

• Window Film Evaluation: Test car or building glass transmissions to assess insulation or privacy film performance.

• Automotive Glazing Diagnostics: Measure headlight alignment and car window shading.

• Research and Meteorology: Conduct solar radiation surveys for physics or environmental science experiments.

• Agricultural Light Monitoring: Verify daylight levels in greenhouses or open fields for crop growth optimization.

• General Illumination Testing: Assess consistent lighting exposure in architectural installations or glass exteriors.

Because of its peak‑hold and directional compass aid, the LX‑107 supports dynamic field workflows by guiding orientation and capturing transient irradiance levels efficiently.

Key Features Summary

• Measurement unit selectable between W/m² and BTU/(ft²·h)

• Measurement range up to approx. 2,000 W/m² (634 BTU/(ft²·h))

• Resolution of 1 W/m² or 1 BTU/(ft²·h)

• Accuracy ±5% or ±10 W/m² (whichever is greater) ◆ auto‑calibrated error of about ±0.38 W/m² per °C from 25 °C baseline

• Fast sampling rate (~0.25 sec) with 3½‑digit LCD display (max. 1,999 counts)

• Peak‑hold, max/min, data‑hold modes for flexible reading types

• Built‑in compass orientation aid

• Auto‑range with overload indication

• Auto‑power‑off to conserve battery

• Compact dimensions: ≈ 100 × 60 × 27 mm; weight ≈ 300 g

• Battery: 9 V standard type; operating life ~100 hr

• EMC compliant under EN 61326 and safely insulated to EN 61010‑1 standard

• Suitable operating range: 5 °C to 40 °C, ≤ 80% RH; storage range: −10 °C to 60 °C, ≤ 70% RH

• Accessories typically include carrying case, battery, and user manual

Professional Advantages

For engineers, solar technicians, building inspectors, and research professionals, the HX‑107 offers reliable solar irradiance readings with flexible measurement modes that capture maximum, minimum or peak values. Its directional compass feature helps align sensors accurately in field workflows. The durable build, long battery life, and simplicity of use make it an efficient tool for audits, installation tuning, window testing, and solar diagnostics.

Conclusion

The HTC LX‑107 Solar Power Meter is a compact, durable, and user‑friendly instrument for accurate measurement of solar radiation. Featuring professional‑grade accuracy, directional guidance, and multiple measurement modes, it is ideal for a wide range of applications—from car glazing testing and solar panel alignment to laboratory studies and agricultural light monitoring. With long battery life and a rugged portable design, the LX‑107 provides consistent performance for any field or indoor solar measurement task.