Hot Wire, Probe Type Hot Wire, Relative Humidity Accuracy +/-3 Percent, Includes NIST Certificate, Minimum Relative Humidity Measured 0 Percent, Minimum Temperature Measured 0 Degrees F, Minimum Velocity Measured 0 fpm, Maximum Relative Humidity Measured 95 Percent, Maximum Temperature Measured 200 Degrees F, Maximum Velocity Measured 9,999 fpm, Compatible with Grainger Part Number 3ATR6, Compatible with Manufacturer Model Number 7565, 7575, 9555, 9565, TA460, TA465