Improving Safety during Turnarounds Archives

Tiger XT Range Comparison Guide

A Complete Guide To Benzene

Contact Us

Titan Brochure

Falco TAC Brochure

Tiger XT Select Brochure

Cub TAC Brochure

Xylene Gas Factsheet

Ethylbenzene Gas Factsheet

Toluene Gas Factsheet

Benzene Gas Factsheet

Monitoring BTEX in Petrochemical Environments Video

Please select a country or region

Choose another country or region to see content specific to your location.

Diffusion Vs. Pumped Fixed Gas Detection

Diffusion Fixed Gas Detection Device

A diffusion gas detection device works, as the name suggests, on the diffusion principle. The sensor is exposed to the ambient air and will measure the gas by means of the diffusion principle. Diffusion means proportional spread of molecules over the available space (from high concentration to low concentration). This also means that a diffusion gas detection device is only able to measure the concentration of gases at the location where the device is located. Since there is no forced flow of the gas to be measured, this device is not suitable for taking measurements remotely, but they do accurately identify what’s present in a given location.

Pumped Fixed Gas Detection Device

Pumped instruments are equipped with a built-in sampling pump. This means that the device is constantly drawing in gases. A sampling hose may be connected to extend the reach. This means that you can take a measurement from a safe distance so you have an idea of which gases will be present in which concentration before you are exposed to this environment. This allows you to make an appropriate risk analysis and make the right strategy and PPE choices based on the measurement results. By positioning the measuring hose correctly, you can also make a correct measurement at different heights to chart all risks.

Hub Spot Submit CV form

Register your instrument placeholder for Hub Spot Form

Request a quote — HubSpot form

OEM Sensors – comparison

Please scroll to compare more OEM Sensors

Please scroll to compare all OEM Gas Sensors, tick to hide sensors to compare the most suitable variants.

Reset Comparison

Hide
Comparative specifications
Sensor Variant	MiniPID 2 PPM WR VOC Sensor	MiniPID 2 PPM VOC Sensor	MiniPID 2 PPB WR VOC Sensor	MiniPID 2 PPB VOC Sensor	MiniPID 2 HS VOC Sensor	MiniPID 2 10.0 eV VOC Sensor	MiniPID 2 11.7 eV VOC Sensor	MiniPID 2 PPB XF Sensor
Electrode Stack Colour	Blue	Blue	White	White	Red	White + Gold Spot	White	White + Filter
Minimum Detection Limit	500 ppb	100 ppb	20 ppb	1 ppb	0.5 ppb	5 ppb	100 ppb	1 ppb
Range	0 to >10,000 ppm	0 to 4000 ppm	0 to >200 ppm	0 to >40 ppm	0 to >3 ppm	0 to >100 ppm	0 to >100 ppm	>40 ppm
Response Time T90 (s)	<3	<3	<8	<8	<12	<8	<8	<12s
Sensitivity	>0.4 mV/ppm @ 100ppm	>0.65 mV/ppm @ 100 ppm	>5 mV/ppm	>30 mV/ppm	>600 mV/ppm	>15 mV/ppm	>1 mV/ppm	>30 mV/ppm
Lamp Energy	10.6 eV	10.6 eV	10.6 eV	10.6 eV	10.6 eV	10.0 eV	11.7 eV	10.6eV
	Product Details	Product Details	Product Details	Product Details	Product Details	Product Details	Product Details	Product Details

Improving Safety during Turnarounds Archives - Ion Science UK