HT INSTRUMENTS Multi LED luxmeter HT309 1009470

The HT309 Multi LED Luxmeter from HT INSTRUMENTS is engineered for precise illuminance measurement across a wide range of light sources, including white, red, blue, green, and yellow LEDs. Unlike standard luxmeters that may misread LED lighting, this model uses a silicon photodiode sensor with a CIE photopic filter and cosine correction, ensuring accurate readings in line with human eye response.

Highlights

• Measurement range: 0.01 to 400,000 Lux
• Accuracy: ±3% rdg ±0.5% f.s. (standard incandescent lamp, 2856K)
• Supports Lux and Foot-candle units
• MAX/MIN/AVG, Peak HOLD, Data HOLD, and Relative functions
• 4-digit LCD with bargraph
• Auto power off and low battery indication

In daily use

The HT309 provides reliable light measurements for workplace safety audits, photography, horticulture, and LED lighting verification. Its automatic ranging and 2 times per second sampling rate deliver quick, stable readings. The included carrying case and battery make it ready for field use.

Full specifications

• Measurement range: 0.01 to 400,000 Lux
• Accuracy: ±3% rdg ±0.5% f.s. (standard incandescent lamp, 2856K)
• Resolution: 0.01 Lux (minimum)
• Spectral response: CIE photopic (V-lambda) curve
• Sensor type: Silicon photodiode with filter
• Display: 4-digit LCD with bargraph
• Light source compatibility: White, Red, Blue, Green, Yellow LEDs
• Measurement functions: MAX/MIN/AVG, Peak HOLD, Data HOLD, Relative
• Ranging: Automatic
• Cosine correction: Yes
• Zero adjustment: Yes
• Sampling rate: 2 times/second
• Auto power off: Yes
• Power supply: 1x 9V battery (6F22)
• Battery life: Approx. 200 hours
• Operating temperature: 0°C to 50°C (32°F to 122°F)
• Operating humidity: 0% to 80% RH
• Safety standards: IEC/EN61010-1, IEC/EN61326-1
• Included accessories: Carrying case, battery, user manual

Final note

The HT309 is a versatile tool for professionals who need accurate LED light measurement without guesswork.