NEO – Photo-Ionization Detector


The NEO is one of the most advanced handheld VOC (Volatile Organic Compound) monitors available for ppb (parts per billion) detection. VOCs include a variety of chemicals such as benzene, alcohols, fuels, paint thinners, industrial solvents and many others, which can have short and long-term adverse health effects. Measuring these compounds is essential for worker protection in industries like oil & gas, fire & hazmat, pharmaceuticals, paints & adhesives, and many others. In addition, VOC monitoring is useful chemical process control, detecting leaks and other releases to the environment, and in measuring indoor air quality. The NEO offers several models from the most sensitive 1 ppb to a high range up to 15,000 ppm for different applications, and a benzene-specific version (NEO BENZ). Novel designs of the Photo-ionization Detector (PID) and Ultraviolet (UV) lamp provide outstanding sensitivity, stability and reproducibility. Options include real-time data monitoring with a built-in wireless modem using mPower Suite application software.


• Size: 9.06 x 3.15 x 2.36 in (230 x 80 x 60 mm), Weight: 25 oz (700 g)
• 1 ppb to 15,000 ppm ranges of VOC
• 3-second response time
• Large and intuitive display
• Integrated Correction Factor list of more than 700 compounds
• Built-in pump for up to 45 meters sampling distance
• Man-Down alarm with real-time remote wireless notification
• Benzene/Butadiene specific version available with filtering tubes for measuring 0.05 to 200 ppm benzene or butadiene (NEO BENZ)
• ISM wireless connection option
• Easy service and maintenance
• Micro-USB charge port


• Industrial Hygiene
• Oil & Gas
• Benzene-Specific Measurements
• Environmental Testing
• Fire & Hazmat
• Paints, Adhesives & Printing
• Degreasers
• Fumigants
• Heat Transfer Fluids
• Industrial Solvents
• Ammonia
• Pulp Mills
• Indoor Air Quality (IAQ)



General Specifications

Size9.06 x 3.15 x 2.36 in (230 x 80 x 60 mm)
Weight24.7 oz (700 g)
SensorPhoto-ionization sensor with standard 10.6 eV lamp (9.8 eV lamp in MP186)*
Response Time3 seconds (t90)
Accuracy±3% (at calibration point)
Battery/ Run TimeRechargeable Lithium-Ion battery with 24 hours typical operation
Keypad4 Operation keys
Sampling PumpBuilt-in pump with 3 settings from 300 to 430 cc/min Sample from up to 100 ft (30 m)
Display128 x 128 graphical LCD, 1.77 x 1.73 in (45 x 44 mm), with LED backlight for enhanced display readability
Direct ReadoutReal-time reading of gas concentration (ppb, ppm, mg/m3, μg/m3), PID measurement gas and correction factor, lamp on/off, Man-Down alarm on/ off, battery status, pump status, datalogging on/off, wireless on/off, temperature and time
AlarmsAudible (90 dB @ 30 cm), visual (flashing bright red LEDs), and on-screen indication of alarm conditions plus wireless remote alarm notification • High, Low, TWA and STEL alarms • Over range alarm, battery low alarm • Man-Down alarm with pre-alarm and real-time remote wireless notification
EMI/RFIHighly resistant to EMI/RFI Compliant with EMC Directive 89/336/EEC
IP RatingIP-66/67
Datalogging CapacityStandard 12 months at one-minute intervals Storage interval adjustable from 1 to 3,600 seconds
CalibrationTwo/three-point calibration
Low Flow AlarmAuto pump shutoff at low-flow condition
Charging and CommunicationCharging, data download, instrument setup and firmware upgrades on PC or laptop via Micro USB Wireless data and alarm status transmission via builtin RF modem
Wireless Range1,000 ft (300 m) line of sight
Correction FactorsIntegrated Correction Factor list of more than 200 compounds
Safety CertificationsClass I, Div 1, Group ABCD Class II, Div 1, Group EFG Class III, Div 1 T4, -20°C ≤ Tamb ≤ +50°C Ex ia IIC T4 Ga II 1G Ex ia IIC T4 Ga (pending) European Conformity UL Listed
Temperature-4° to 113°F (-20° to 50°C)
Humidity0% to 95% Relative humidity (non-condensing)
AttachmentsDurable rubber boot, color coded for different models; Tube holder for MP186
Warrenty2 Years including lamp and sensor (1-year for 9.8 eV lamp)
Model Potions
Model NumberVoc Range (ppm)Part No.
MP181 (NEO PPM)0.01-5,000M011-0004-000
MP182 (NEO EXT)0.01-15,000M011-0005-000
MP184 (NEO PPB)0.001-15,000M011-0006-000
MP185 (NEO SEMI) (w/o MicroUSB)0.001-15,000Special Order
MP186 (NEO BENZ)* (w/9.8 eV Lamp & Tube Holder)0.05-200 Benzene --------------- 0.005-10,000 VOCM011-0013-000

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