Quest EVM-4/CO, IAQ Monitor, 4Sensor, CO2, CO, Temp...

Quest EVM-4/CO Indoor Air Quality Monitor (datalogging) monitors for CO2, CO, Temperature, and Humidity, (with air probe input connector). Kit includes base model with CO2 and CO sensors, 12V DC universal power supply, toxic gas calibration adapter, USB cable, and storage case. Purchase Air Probe-10 Air Velocity Probe separately.

EVM-4 Comprehensive IAQ Analysis
Monitors and logs: Carbon monoxide

Relative humidity
Temperature
Carbon dioxide (room air exchange rates calculated in QuestSuite Pro II Software)
Optional sensor accessories: AirProbe-10 velocity probe, PID, particulates, replace CO sensor with one of 8 other toxic gas sensors

Application

Worksite monitoring
Industrial hygiene surveys
Military site evaluation
Aircraft and train environment sampling
Construction/mining site monitoring
Engineering studies
Industrial fenceline monitoring
Remediation sampling
IAQ walk-through and stationary studies
Air quality assessment
VOC screening and monitoring
Regulatory compliance

Contact us for Additional accessories

Performance Profile

Method	Base Units	Display Res.	Display Range	Accuracy/Repeatability

Carbon Dioxide
NDIR	ppm	1	0-20,000	± 2% of signal, ± 50 ppm between 0-2500
Toxic Gas (Electrochemical Sensors)
Carbon Monoxide	ppm	1	0-1000	± 5%/2% of signal
Chlorine	ppm	0.1	0.0-20	± 5%/2% of signal
Ethylene Oxide	ppm	0.1	0.0-20	± 5%/2% of signal
Hydrogen Cyanide	ppm	0.1	0.0-50	± 5%/2% of signal
Hydrogen Sulfide	ppm	1	0-500	± 5%/2% of signal
Nitric Oxide	ppm	0.1	0.0-100	± 5%/2% of signal
Nitrogen Dioxide	ppm	0.1	0.0-50	± 5%/2% of signal
Oxygen	%	0.1	0.0-30	± 5%/2% of signal
Sulfur Dioxide	ppm	0.1	0.0-50	± 5%/2% of signal
Temperature
Junction Diode	deg C	0.1	-10.0- 60.0	± 1.1 deg C
Junction Diode	deg F	0.1	14.0- 140.0	± 2 deg F
Relative Humidity
Capacitive	% humidity	0.1	0.0-100	± 5% RH of signal between 10 - 90%
Air Velocity
Omni-directional Heated Thermistor Windprobe	m/sec	0.1	0.0-20	± 0.12 m/s + 4.5% of signal
Omni-directional Heated Thermistor Windprobe	ft/min	1	0-3940	± 23.6 ft/min + 4.5% of signal

General
Sample Pump Flow Rate	1.7 L/min
Power/Run Time	Rechargeable Li-Ion battery pack provides minimum of 8 hrs of continuous operation
Weight	2.9 lb (1.3 kg)
Standards	CE marked and RoHS compliant

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