Extech 407026 Heavy Duty Light Meter
Features
- Four lighting types
- Cosine and color corrected measurements
- Other functions include "ZERO" re-calibration, Data Hold, & MAX/MIN/AVG readings
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Extech Heavy Duty Light Meter enhances accuracy by selecting one of four lighting types: tungsten/daylight, fluorescent, sodium, or mercury. The meter utilizes a precision diode and color correction filter and adjusts for cosine and color-corrected measurements. The microprocessor assures maximum accuracy through an Fc range of 200.0, 2000, and 5000Fc and a lux range of 2000, 20,000, and 50,000 lux.
Data Storage
The built-in RS232 serial interface provides a connection with the optional Windows Data Acquisition Software, which enables users to display and capture readings on a PC and set time intervals and alarms. The battery-operated datalogger module stores over 8000 readings for later transfer to a PC.
- Circuit: custom one-chip LSI microprocessor circuit
- Display: 3.5 digit (2000 count) LCD display with contrast adjustment
- Measurement ranges: LUX: 0 to 50,000 LUX (3 range), Fc: 0 to 5000 Fc (3 range), relative mode: 0 to 1999%
- Data hold: freezes displayed reading
- Lighting types: Sodium, daylight/tungsten, fluorescent, & Mercury
- Sensor structure: cosine/color corrected photo-diode meets CIE
- Memory store/recall: records/recalls max/min/avg readings
- Sample rate: 0.4 seconds (approx.) per reading
- Zero adjust: push-button procedure
- Auto power off: after approx. 10 minutes
- Data output: RS-232 PC serial interface
- Operating conditions: 32 to 122F (0 to 50C),< 80% RH
- Power supply: 9 V battery
- Power consumption: approx. 5 mA DC (approx. 200hr battery life)
- 2,000 LUX range: 0-1,999 LUX display, 1 LUX resolution
- 20,000 LUX range: 1,800-19,990 LUX display, 10 LUX resolution
- 50,000 LUX range: 18,000-50,000 LUX display, 100 LUX resolution
- 200 FC range: 0-186.0 FC display, 0.1 FC resolution
- 2,000 FC range: 167-1,860 FC display, 1 FC resolution
- 5,000 FC range: 1,670-5,000 FC display, 10 FC resolution
- Relative mode: range: 0-1999%, resolution: 1%
- Accuracy: +/-(4% + 2 digits) of full scale (applies to a calibration performed using a precision standard incandescent tungsten light source of 2856K with a meter on the tungsten setting.)
- Dimensions: instrument: 7.1"x2.8"x1.3" (180x72x32mm), sensor: 3.3"x2.2"x0.7" (85x55x17.5mm)
- Weight: 0.71 lbs. (320g)
- Warranty: 3 years
- (1) Light meter
- (1) 9 V battery
- (1) Light sensor
- (1) Protective cover with 46" (1.2m) cable
- (1) Protective holster with stand
Select Options
In The News
Three Decades of Research at Acton Lake
A multi-disciplinary team at Miami University, Ohio, has been studying the environmental change at Acton Lake for over three decades. Using three different NexSens buoys over this time, the team has an incredible archive of data that is helping build a picture of Acton’s past, present, and future. Until recently, a NexSens CB-50 buoy was used alongside other environmental monitoring at Acton Lake. In May 2025, the Miami team deployed a new XB-200 buoy , future-proofing their ongoing monitoring using real-time buoy systems. Acton Lake, a small hypereutrophic reservoir in southwest Ohio, covers 2.4km² and has a maximum depth of about 8m. The dam was built in 1956, and the lake has a large agricultural watershed.
Read More
Source Water Monitoring in Albany, New York: Tracing Water Quality throughout Tributaries
Thousands of US cities pull their drinking water from natural source waters like reservoirs, rivers, and streams, making overall watershed health a key consideration for water providers. In Albany, New York, the Albany Department of Water and Water Supply delivers drinking water to over 100,000 residents as well as monitors and manages the larger drinking water supply watershed. Hannah Doherty, Environmental Specialist at the Albany Department of Water and Water Supply , spends her days working with a small team to monitor the drinking supply and the connected water bodies. Doherty explains, “We’re the first to encounter the water that ends up being the drinking water.
Read More
Wildfire Prevention in the Sierra Nevada Region with the Yuba Watershed Institute
Though recent wildfires have sparked new conversations about wildfire management and response, groups like the Yuba Watershed Institute have been monitoring the forests and water resources of the Sierra Nevada region for decades, managing approximately 5,000 acres of land with the Bureau of Land Management (BLM) and about 7,000 acres in private land partnerships. The goal of the Institute is to work with local communities and land agencies to improve watershed and forestry management through informed practices and public outreach. The goals of the Yuba Watershed Institute are three-fold: Improve the ability of fire suppression agencies like the California Department of Forestry and Fire Protection ( CAL FIRE ) and the US Forest Service.
Read More
