Related Products
Request More Information



High-End Photo Ionization Detector
Brand: WatchGas Detection
Made in: Netherlands

The 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 1ppb to a high range up to 20.000 ppm for different applications and user selections. A novel design of Photo Ionization Detector (PID) and Ultra Violet (UV) lamp significantly reduces interferences due to humidity. Options include real-time data monitoring with a built-in wireless modem at ConnectM application software.

NEO Main Features

  • Size: 260 x 78 x 58 mm with boot, Weight: 25 oz (708 g) (with boot);
  • 1 ppb to 20.000 ppm ranges of VOC;
  • Benzene-specific measurement version 0.05 to 200 ppm benzene (NEO BENZ)*
  • Measurement of Butadiene possible with Butadiene Separator tube;
  • 3-second response time VOC mode;
  • IP-67 when turned off, IP-66 when turned on;
  • 95 dB alarm;
  • Large and intuitive display;
  • Integrated Correction Factor list of more than 800 compounds;
  • Built-in pump for up to 30 meters sampling distance;
  • Man-Down alarm with real-time remote wireless notification;
  • ISM wireless connection option;
  • Easy service and maintenance;
  • Micro-USB charge port.


The WatchGas 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 builtin wireless modem using WatchGas Suite application software.

Detector Specifications

Size 260mm x 78mm x 58mm (with boot)
Weight 708g (with boot)
Sensor Technology Photo-Ionization sensor with standard 10.6 eV lamp (9.8 eV lamp in MP186*)
Temperature -20°C ~ +50°C
Humidity 0% ~ 95% RH (non condensing)
Alarm Type High, Low, TWA and STEL alarms
Over range alarm, battery low alarm
Man-Down alarm with pre-alarm and realtime remote wireless notification
Low Flow Alarm: auto pump shut off at low flow condition
Alarm Signal Acoustic: 95dB @ 30 cm
Visual: Flashing bright red LEDs, and on-screen indication of alarm conditions plus wireless remote alarm notification
Display 128 x 128 graphical LCD, 45 x 44 mm with LED backlight for enhanced display readability
Direct Readout Real-time reading of gas concentration (ppb, ppm, mg/m3), PID measurement gas and correction factor, lamp on/off, Man-Down alarm on/off, battery status, pump status, data logging on/off, wireless on/off, temperature and time
Calibration Two/three-point calibration
Datalogging Standard 2 months at one-minute intervals
Data logging interval Storage interval adjustable from 1 to 3.600 seconds
Battery/Run Time Rechargeable Lithium-Ion battery with 24 hours typical operation
Measurement Pumped
Housing Durable rubber boot, color-coded for different models
Sampling Pump Built-in pump with 2 settings from 300 to 430 cc/min sample from up to 30m
Charging and communication Charging, data download, instrument configuration hand firmware upgrades on PC or laptop via Micro USB. Configuration also via BLE using Mobile App on Android phone or tablet.
Response time T90 3 seconds VOC Mode
45 seconds @ 20°C Benzene Tube Mode
120 seconds @ 20°C Butadiene Tube Mode
Accuracy ±3% (at calibration point)
Wireless range 300m line of sight
Correction Factors Integrated Correction Factor List of more than 700 compounds
IP-Rating IP67
IP66 when turned on
EMI/RFI Highly resistant to EMI/RFI
Compliant with EMC Directive 2014/30/EU
Safety Certifications UL: Class I, Div 1, Groups A,B,C,D, T4, -20°C ≤ Tamb ≤ +50°C
IECEX: Ex is IIC T4 Ga
ATEX: II 1G Ex is IIC T4 Ga
CE: Conformité Européene
Warranty 2 years including lamp and sensor (1 year for 9.8 eV lamp)

Order Information

Description Article Number
Robust Case M011-3020-W00
Lamp Cleaning Set
PID Lamp Cleaning Solution
Finger Protection
Cotton Buds
Cleaning Wipe
Inlet Filters M490-0004-W05
PID Sensor M085-3004-W00
USB Charger M004-3051-W00
USB Cable M011-3003-W00
Inlet Probe (Flexible) M011-3012-W00
Inlet/Outlet Luer Adapter M490-0024-W00
Benzene Separator Tube (Benzene only) M070-0001-W00
Tube Holder Probe for Separator Tubes (Benzene only) M011-2018-W00
Pre-Filter Tube Butadiene 0.1-200 ppm (Butadiene only) UNI-CF000904


Sensor Specifications

Model Detectable Gas Ranges Resolution Article Number
NEO PID BLUE 0 - 5000 ppm 0.01 ppm M011-0004-W00
High Range
0 - 15000 ppm 0.01 ppm M011-0005-W00
Extended Range
0 - 20000 ppm 0.01 ppm On request
NEO Benzene Specific RED (w/9.8 eV lamp & tube holder)*
(NEO Butadiene on request)
0 - 200 ppm

0 - 10000 ppm

0.01 ppm

0.001 ppm

NEO PPB Black 0 - 15000 ppm 0.001 ppm M011-0006-W00

*9.8 eV lamp detects fewer VOCs than a 10.6 eV lamp does

Product Application:

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

Key Features

  • Most accurate and more linear than comparable PIDs
  • Most stable ppb-level PID on the market
  • Outstanding linearity over 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
  • Wireless communication
  • Large backlight graphic display
  • Lamp glow indicator
  • Rugged high quality plastic housing with rubber outer boot

Standard Equipment:

  • 1x Robust Case
  • 1x PID Lamp Cleaning Solution
  • 5x Inlet Filters
  • 1x USB Charger
  • 1x USB-Cable
  • 10x Finger Protection
  • 20x Cotton Buds
  • 1x Cleaning Wipe
  • 1x Inlet Probe
  • 1x Inlet /outlet Luer Adapter
  • 1x Quick Start Guide
  • Benzene Seperator tube (NEO Benzene only)

The contents are subject to change without prior notice.


Request More Information

We are always happy to answer you question and requests. If you need more information about our products or want to cooperate with us, contact us without any restriction. Please fill out the form below. Our team will respond to you within one business day.

"*" indicates required fields

This field is for validation purposes and should be left unchanged.