Photoionization Detector WatchGas NEO

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The WatchGas NEO is one of the most advanced handheld VOC (Volatile Organic Compound) monitors available for ppb (parts per billion) detection.


The WatchGas NEO is one of the most advanced handheld VOC (Volatile Organic Compound) monitors available for ppb (parts per billion) detection. 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.

Detector ranges


  • 0.01 ppm – 5.000 ppm
  • 0.01 ppm – 15.000 ppm

NEO Benzene specific RED

  • 0.05 ppm – 200 ppm benzene
  • 0.005 ppm – 10.000 ppm VOC


  • 0.001 ppm – 15.000 ppm


  • Smaller and lighter weight than comparable PIDs
  • Most stable ppb-level PID on the market
  • Outstanding linearity over the full measurement range
  • Easy charging on laptop or other USB port
  • USB Micro Charger; combination USB-m charging and communications cable
  • Powerful battery (run time 24 hours)
  • Bluetooth Low Energy (BLE) connectivity standard
  • ISM Wireless communication at longer distances and with no subscription fees
  • Large backlight graphic display
  • Lamp glow indicator
  • Rugged, stainless-steel housing with rubber outer boot


  • Confined space measurement
  • Measurement in low (ppb) ranges

Additional information


230 x 74 x 55 mm (9.1 x 2.9 x 2.2 in) (with boot)


708 g (24.9 oz) (w/boot)


Photo-ionization sensor with standard 10.6 eV lamp (9.8 eV lamp in MP186)*

Response time T90

3 seconds


±3% (at calibration point)

Battery / Run time

Rechargeable Lithium-Ion battery with 24 hours typical operation


4 Operation keys

Sampling Pump

Built-in pump with 3 settings from 300 to 430 cc/min. Sample from up to 100 ft (30 m)


128 x 128 graphical LCD, 1.77 x 1.73 in (45 x 44 mm), with LED backlight for enhanced display readability

Direct Readout

Real-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


Audible (95 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 re-mote wireless notification

Datalogging Capacity

Standard 12 months at one-minute intervals. Storage interval adjustable from 1 to 3,600 seconds


Two/three-point calibration

Low Flow Alarm

Auto pump shutoff at low-flow condition

Charging and communication

Charging, data download, instrument setup and firm-ware upgrades on PC or laptop via Micro USB. Wireless data and alarm status transmission via built-in RF modem

Wireless range

1,000 ft (300 m) line of sight

Correction Factors

Integrated Correction Factor list of more than 200 compounds

IP Rating

IP-66 when turned on / IP-67 when turned off


Highly resistant to EMI/RFI
Compliant with EMC Directive 2014/30/EU

Safety certifications

UL/cUL: Class I, Div 1, Group ABCD
IECEx: Ex ia IIC T4 Ga
ATEX: II 1G Ex ia IIC T4 Ga
CE: Conformité Européenne


-20° to 50°C (-4° to 122°F)


0% to 95% Relative humidity (non-condensing)


Durable rubber boot, color-coded for different models; Tube holder for MP186


2 Years including lamp and sensor (1-year for 9.8 eV lamp)

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