• Monitors indoor/outdoor heat stress to help limit the danger of heat-related injury
• Simultaneously displays air temperature or globe temperature, humidity, and WBGT
• Stores up to 12,000 readings each containing air temperature, humidity, WBGT, and globe temperature
• Selectable sampling rate of 1, 5, 10, 30, 60, 90, or 120 minutes
• Programmable audible and visual WBGT alarm 68 to 122°F/20 to 50°C

The Triplett HSDL300 is a heat stress WBGT (Wet Bulb Globe Temperature) meter that monitors indoor or outdoor heat stress to help limit the danger of heat-related injury. It simultaneously displays air temperature or globe temperature, humidity, and WBGT. The HSDL300’s memory stores up to 12,000 readings, each containing air temperature, humidity, WBGT, and globe temperature. Stored readings are transferred to a PC via a USB interface.

The HSDL300 can be programmed to sample at a rate of 1, 5, 10, 60, 60, 90, or 120 minutes. It features a programmable audible and visual WBGT alarm and a backlight that changes color as the WGBT value increases (Green/Yellow/Red/Flashing Red). The In/Out function switch measures WGBT with or without the effects of direct sunlight. 

No backlight: below 80°F (26.7°C)

Green: 80 to 85°F (26.7 to 29°C)

Yellow: 85 to 88°F (29.4 to 31°C)

Red: 88 to 90°F (31 to 32.2°C)

Flashing Red: above 90°F (32.2°C)