QRAE II is a programmable multi-gas monitor, available in pumped and diffusion models, designed to provide continuous exposure monitoring of oxygen, hydrogen sulfide, carbon monoxide and combustible gases for workers in hazardous environments. It monitors with the following types of sensors:
1. Combustible gases are monitored with catalytic bead sensors.
2. Hydrogen sulfide (or sulfur dioxide) and carbon monoxide are monitored with electrochemical sensors.
3. Oxygen is monitored with a solid polymer electrolyte (SPE) sensor.
1.1 Key Features
Lightweight and Compact 9 oz (250 g) diffusion model, 12 oz (350 g), pump version, handheld size. User friendly menu-driven, intuitive end-use operation. Programmable alarm thresholds audio buzzer and flashing display alarm.
• Standard configuration includes CO, H2S, LEL, and O2 sensors
• Replaceable, rechargeable Li-Ion battery
• Large, easy-to-read display
• Datalogging with large memory
• Visual alarm with bright red flashing LEDs
• Loud audible alarm (95dB at 30 cm) • Vibration alarm
• Rugged weather-resistant composite case
• Diffusion model and pump model QRAE II
1.2 Specifications QRAE II
Pumped or diffusion 4-gas with datalogging
Diffusion: 5" L x 2.8" W x 1.5" H (125mm x 72mm x 38mm)
Pump: 5" L x 2.8" W x 1.5" H (125mm x 72mm x 38mm)
Weight: Diffusion: 9 oz (250g) Pump: 12 oz (350 g) with battery
Detectors: 2 Electrochemical toxic gases sensors 1 Solid Polymer Electrolyte oxygen sensor 1 Catalytic sensor for combustible level organics
Battery: Rechargeable 3.7V Li-ion battery pack (6-hour charge time) or a 3 AA alkaline battery adapter. Operating Time: Up to 10 hours continuous w/ Li-ion battery pack
Display: 4-line graphical LCD with automatic LED backlight for dim lighting conditions
Keypad: 2 programming/operation keys
Direct Readout: Up to 4 simultaneous values with sensor name, battery charge, high and low values for all sensors, elapsed time, and datalogging on/off state
Range, Resolution & Response Time: LEL 0-100% 1 % 15 sec O2 0-30% 0.1 % 20 sec CO 0-1000 ppm 1 ppm 25 sec H2S 0-100 ppm 0.1 ppm 30 sec Alarm
Settings: Separate limits for TWA, STEL, High, Low Alarms: >95 dB @ 30 cm buzzer, flashing red LEDs, vibration alarm, LCD to indicate exceeded preset limits, low battery, or sensor failure
Calibration: Two-point field calibration for fresh air and standard reference gas
Protection: Password protected calibration settings, alarm limits, and data Intrinsic
Safety: CSA Class I, Division 1, Group A, B, C, D, T4 (US & Canada), SIRA ATEX II 2G Ex ia d II C T4 Gb (Europe), IECEx Ex d ia II C T4 Gb EM
Immunity: No effect when exposed to 0.43mW/cm2 RF interference (5-watt transmitter at 12"/10cm).
Data Storage: 64,000 readings (64 hours, 4 channels at 1 minute interval) in non-volatile memory.
Datalog Interval: Programmable 1- to 3,600-second intervals Alarm Settings: Separate alarm limit settings for TWA, STEL, Low and High alarm. C
ommunication: Download data to PC and upload monitor setup from PC through an RS-232 link to PC serial port Temperature: -20° C to 50° C (-4° F to 122° F)
Humidity: 0% to 95% relative humidity (non-condensing)