measures formaldehyde (ch₂o or hcho) concentration, air temperature and humidity

• simultaneously displays formaldehyde concentration, air temperature, and relative humidity readings with date (year, month, day) and time
• visibly bright led (green & red) and three facial icons indicate indoor ch₂o warning level
• audible beeping alarm default at 0.08ppm (adjustable)
• designed with electrochemical ch₂o sensor
• min/max value recall function
• calculates statistical weighted averages of twa (8-hour time weighted average) and stel (15-minute short term exposure limit)
• ch₂o calibration function in fresh air
• internal memory for manually storing up to 99 readings with recall function
• complete with universal ac adapter (100v-240v) and multiple plug types (us, eu, uk, aus)