Onset’s HOBO MX1102 CO2 logger makes it more convenient than ever to measure and record CO2 in buildings and other non-condensing environments. It measures CO2 from 0–5,000 parts per million (ppm) – and our free HOBOconnect app lets you access data right from your mobile phone or tablet within a 100-foot range of the logger.
The MX1102 also features a USB port so it can be used with a computer running HOBOware graphing & analysis software.

2B Tech has taken the next step in miniaturization of UV-based ozone monitors by developing the Personal Ozone Monitor or "POM." The basic POM unit has dimensions of 4 × 3 × 1.5 inches and weighs only 0.8 lb / 1.0 lb without / with battery (340 g / 450 g). It has a built in GPS so that ozone measurements may be logged continuously along with geographic location. By folding the optical path in the shape of a "U," it was possible to achieve the same path length in the POM as in the Models 202, 205, and 106-L and thus have similar precision and accuracy (~1.5 ppb).

The Sling Psychrometer is an easy and affordable way to measure relative humidity levels quickly and accurately. It is ideal for many applications, including the measurement of conditions within indoor environments, storage areas, laboratories and more.

Humans exhale Volatile Organic Compounds (VOCs) as well as CO2. The BAPI sensor is able to measure these VOCs, therefore it is as good an indicator of space occupancy as a CO2 sensor. The BAPI Sensor is different from other VOC sensors because it has been optimized for Demand Controlled Ventilation (DCV). Using a calibration algorithm, the sensor value is converted to an output with a high correlation to a CO2 level. This lets you use ASHRAE’s occupancy-based VRP schedule to ventilate.

The CDE and CWE are non-dispersive infrared (NDIR) sensors designed for measuring environmental CO2 concentration in ventilation systems and indoor living spaces. Their measurement range of 0 to 2000 ppm makes them compliant with ASHRAE and other standards for ventilation control
The CWE/CDE Series provides a user-selectable 4 to 20 mA or 0 to 10 Vdc output for versatility. Microprocessor-based digital electronics and a unique self-calibration algorithm improves long-term stability and accuracy.

The BAPI-Stat 3 CO2 Sensor is an accurate and reliable way of incorporating demand controlled ventilation into a building’s HVAC strategy. It has a field selectable output of 0-5 or 0-10V and has been optimized for periodically unoccupied areas. The unit features continuous automatic air pressure compensation for accurate readings despite the weather or the altitude of the installation, which earned the sensor a 2012 AHR Expo Innovation Award. The unit is available as CO2 alone or with temperature, humidity, temp setpoint and override.

Identify areas with low or substandard ventilation. Identify hidden energy savings in over-ventilated spaces. Determine if ventilation is a factor in air quality complaints. Locate the presence of combustion fumes from vehicles and appliances. Use as a reference to calibrate wall mounted CO2 sensors. Telaire 7001 with Onset cable to hook to hobo and 120 V. adapter 6V, 500mA output. See attachments for additional information.