RSS-214 Heat Stress Monitor
RSS-214 Heat Stress Monitor

RSS-214 Heat Stress Monitor

Pine Item #

Overexposure to heat is high on anyone's priority list for improving workplace safety, whether the heat is found at a construction site in the middle of the summer, or in a glass and ceramics manufacturing operation. The RSS-214 monitors area temperature in any setting, indoors or out. Its patented globe temperature sensor is highly responsive, typically less than three minutes for the RSS-214 compared to 20 minutes or more with a conventional Vernon globe. A unique self-diagnosis feature at every power-up berifies proper monitor operation. The instrument provides direct read of outdoor and indoor WBGT, and calculates time weighted mean WBGT, metabolic rates and work-to-rest ratios. Temperature can be displayed in degrees celsius or Fahrenheit.


Fast response time

17 hours continuous operation

511 records of data storage

Optional add-in Data Logger

Displays to 1/10th degree

Direct reading of Wet Bulb, Dry Bulb, and Vernon Globe equivalent

In/out temperatures at 95% accuracy in less than 4 1/2 minutes


Designed to measure environmental factors that contribute to heat stress

Datalogging heat stress monitor measures dry bulb, wet bulb, and globe temperature


Industries affected by high heat

Quantity must be 1 or more
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Technical Specifications 
Size6.2 x 3.75 x 1.75 (inches), 15.8 x 9.5 x 4.5 (cm)
Weight12 oz. (350g)
ReadoutDirect read LCD
  • Indoor wet bulb globe Temperature (IN WBGT)
  • Outdoor Wet Bulb Glope Temperature (OUT WBGT)
  • Wet Bulb (WB)
  • Dry Bulb (DB)
  • Globe Temperature (GT)
WBGT Value Calculations
  • WBGT (outdoor) = 0.7 WB + 0.2 GT + 0.1DB
  • WBGT (indoor) = 0.7 WB + 0.3 GT
  • WB = Wet Bulb; GT = Vernon Globe Equivalent Temperature; DB = Dry Bulb)
Reading Resolution0.1 °C/0.1 °F
Calibrated Ranges25 °C (77 °F); 45 °C (113°F); 60 °C (140 °F)
  • Electronics < 3 seconds (provided sensors are acclimatized)
  • Sensors (90% accuracy) <2.2 minutes
  • Sensors (95% accuracy) <4.5 minutes
  • Globe Temperature (GT) - Construction provides characteristics identical to 6" Vernon Globe
  • Dry Bulb (DB) - Ambient air temperature
  • Wet Bulb (WB) - Wick-covered sensor with reservoir, wetted with deionized or distilled water
Intrinsic Safety*CSA – Std C22.2 No. 157-M1987, EXIA LR84375
Approved Batteries/Power Source
  • Rechargeable 9-volt NiMH battery (Varta™ V7/8H)
  • 9-volt non-rechargeable alkaline battery (Duracell® MN1604 or Eveready® 522)
  • Operate continuously on 3M supplied charger (AC adapter)
Battery LifeApproximately 17 hours – continuous operation
Battery Recharge Time (NiMH)Approximately 14 hours
Operating Temperature Range0 °C to 65 °C (32 °F to 149 °F)
Instrument Storage Temperature-25 °C to 65 °C (-13 °F to 140 °F)

+/-0.4 °C (+/-0.7 °F) of actual temperature at 25.0 °C, 45 °C and 60.0 °C (77.0 °F, 113 °F, 140.0 °F) 

@ air speed = 180 fpm minimum.

Manuals & Data Sheets