Products

LaserGas^TM II Single Path Compact Monitor

The SP Compact Monitors are designed for in-situ measurement across pipes or for by-pass measurements on measurement cells.

Typical path lengths are in the range 10 – 100 cm. These monitors are also the preferred solution for in-situ or by-pass measurements of trace levels of atmospheric gases (O2 and H2O).

The LaserGas II SP Compact Monitor utilizes a transmitter / receiver configuration (mounted diametrically opposite each other) to measure the average gas concentration along the optical line-of-sight.

The monitors’ compact design comprises the transmitter unit with laser module, collimating optics, and main electronics and the receiver unit with focusing lens, photo detector and receiver electronics.

The laser beam is focused (ca. 2 mm diameter) and for that reason the SP compact can measure through very thin nozzles (< 10 mm diameter). Thus, for applications with continuous purge to prevent dust from settling on the windows the SP compact will require very small purge flow (< 150 l/hour per flange).

The transmitter and receiver unit have both environmental protection IP66 for rough industrial environments. The standard optical windows withstand pressures up to 5 bar abs.

Measurement readings are provided through standard 4-20 mA current loops, or as options the fibre-optic output and the Ethernet interface. The latter enables instrument communication via local area networks or the Internet.

Based on the well-proven tuneable diode laser (TDLAS) technology the instrument has a number of unique features.

Features

• No gas sampling – in-situ measurement
• Applicable for measurement across pipes down to 10 cm diameter
• Very low purge gas consumption (purge of optical windows)
• Line measurement (integral concentration over the full pipe diameter)
• Low cost of ownership
• Approved for ATEX zone 2 (EEx n)
• Approved for CSA Class 1 Div 2 (non incendive)

Table of Principal Gases

Gas	Detection limit [ppm]	Max temperature [oC]	Max pressure [bar abs]
NH3	0.15	600	2
HCl	0.05	600	2
HF	0.015	400	2
H2S	3	300	2
O2	100	600 *	20
% H2O	50	600 *	2
ppm H2O	0.1	400	2
% CO	30	600 *	2
% CO2	30	600 *	2
ppm CO	0.3	600 *	2
ppm CO2	0.2	300	2
NO	10	300	2
N2O	1	200	2
CH4	0.2	300	3

NOTE: Detection limits are specified for 1 m optical path and gas temperature / pressure = 25 oC / 1 bar abs.
* Higher temperature on request
Also available are HCN, NO2, C2H2, C2H4, C3H6, CH3I, CH2O, CH2CHCl (VCM), C2H4O (EtO), CH2Cl2 (DCM), HBr, and HI.
Dual Gas: NH3+H2O, HCl+H2O, HF+H2O, CO+CO2, CO+H2O, CO+CH4, O2+temp, CO+temp
Higher pressures may be available on request for certain gases. Please contact us!

Data sheet for download

Updated 2008-06-16

NEO Monitors is a subsidiary of Norsk Elektro Optikk A/S