Photoacoustic Gas Monitor -

The LumaSense Photoacoustic Gas Monitor INNOVA 1512 is based on the photoacoustic infrared spectroscopy and delivers superior sensitivity in a very compact form factor. Extremely versatile by design, the 1512 is capable of measuring almost any gas that absorbs infrared light.

Photoacoustic Field Gas-Monitor INNOVA 1412i Front View
Photoacoustic Field Gas-Monitor INNOVA 1412i View
Photoacoustic Gas Monitor - INNOVA 1512
Photoacoustic Gas Monitor - INNOVA 1512
Photoacoustic Gas Monitor - INNOVA 1512

Example of Applications

  • Occupational Health and Safety measurements – of possible production or accumulation of toxic/ carcinogenic substances in working areas
  • Monitoring of anesthetic agents in hospitals
  • Emission monitoring of greenhouse gases from agricultural production
  • Emission monitoring of exhaust from chemical processes
  • Indoor Air Quality (IAQ) measurements
  • Ventilation and air exchange using tracer gas

Key Features

Our product design leverages the unique strengths of the photoacoustic sensor technique and has consistently delivered the following high value features that make our differentiation:

  • Selectively measures a wide range of gases/vapors
  • Linear response over a wide dynamic range
  • Stable and Reliable: ensuring a maximum of only two calibrations a year
  • User-friendly: easy calibration, configuration, and viewing/analyzing of data via PC
  • Accurate: compensates for temperature and pressure fluctuations, water vapor interference, and interference from other known gases
  • Extremely low-volume flushing possible
  • Operates immediately: virtually no warm-up time necessary
  • Remote control capability via TCP/IP network interface protocol
  • Expandable up to 24 locations with INNOVA 1409 Multipoint Sampler: the Gas Monitor can operate as the system controller for full standalone operation
  • Includes BZ7002 Calibration Software
  • Includes BZ7003 Offline Software to set up the Gas Monitor without connecting it to a PC and to download data stored in the gas monitors internal memories.

Gas Detection Limits

Gas selectivity is achieved through the use of optical filters. By installing up to five filters, the 1512 can measure the concentration of up to five component gases and water vapor in any air sample. The detection limit is gas-dependent, but is typically in the ppb region.


Principle of PAS Measurement

Principle of PAS Measurement System

Accuracy of these measurements is ensured by the 1512’s ability to compensate for temperature and pressure fluctuations, water vapor interference, and interference from other gases known to be present.

Reliability of measurement results can be ensured by regular self tests. This measurement system requires no consumables and very little regular maintenance. For most applications, recalibration is only necessary one to two times a year.

The monitoring system is easily operated through either the front panel, with its push-buttons and display providing short explanatory texts, or through the PC software.

Both interfaces allow the user to configure the monitor, start a measurement sequence, and view the resulting concentration values of specific gases.

The monitor is equipped with standard interfaces: USB, Ethernet, and RS232. These enable the monitor to be integrated into automated process systems.

The 1512 has a built-in pump system that allows samples to be drawn from up to 50 meters away.

For any additional Software Download and Service Net of Photoacoustic Gas Monitor INNOVA 1512 please contact us .


Technical Data

Measurement Technique 
Photoacoustic infrared spectroscopy.

Your LumaSense sales representative will assist in the selection of suitable optical filters. Details are provided in the Gas Detection Limits chart.
Measurement Specifications1
Detection Limit: Gas-dependent, but typically in the ppb region. Using the Gas Detection Limits chart, the detection limit for a selected sample integration time (S.I.T.) can be calculated.
Dynamic Range: Typically 4 orders of magnitude (i.e. 10,000 times the detection limit at 5 S.I.T.). Using two span concentrations it can be expanded to 5 orders of magnitude.
Zero Drift:

Typically ± Detection limit4 per 3 months1

Influence of temperature2 : +/- 10 % of detection limit4 /°C.

Influence of Pressure3 : +/-0.5 % of detection limit4 /mbar.

Repeatability: 1 % of measured value1
Range Drift: +/- 2.5 % of measured value per 3 months1

Influence of temperature2: +/- 0.3 % of measured value/°C.

Influence of pressure3: -0.01 % of measured value/mbar.

Reference Conditions:
1 Measured at 20 °C , 1013 mbar, and relative humidity (RH): 60%. (A concentration of 100x detection limit4 was used in determining these specifications.)

2 Measured at 1013 mbar, and RH: 60 %.

3 Measured at 20 °C and RH: 60 %.

4 Detection limit is @5s S.I.T

Response Time
Is dependent on the Sample Integration Time (S.I.T.) and the flushing time defined. Please see the examples below:
Monitor-Setup  Response Times
S.I.T.: „Normal“ (5 s) Flushing: Auto, (tube: 1 m) One gas: ~27s
5 gases + water: ~60s
S.I.T.: “Low Noise” (20 s) Flushing: Auto, (tube 1 m)  5 gases + water: ~150s
S.I.T.: “Fast” (1s) Flushing: Chamber 4s, Tube “OFF” One gas: ~13s
5 gases + water: ~26s
Interference: The 1512 automatically compensates for temperature and pressure fluctuations in its analysis cell and can compensate for water vapor in the air sample. If an optical filter is installed to measure a known interferent, the 1512 can cross compensate for the interferent.
Acoustic Sensitivity: Not influenced by external sound
Vibration Sensitivity: Strong vibrations at 20 Hz can affect the detection limit.
Internal Data Storage Capacity: The total space available in Display Memory to store data ia 131072 measurement cycles. If a measurement cycle takes 15 sec, then the display Memory space will be sufficient for a 22-day monitoring task.
Pumping Rate: 30 cm3/s (flushing sampling tube) and 5 cm3/s (flushing measurement chamber).
Power Ratings: ~85 VA, 100-240 VAC +/- 10%, 50-60 Hz, Class 1
Air Volume per sample:
Flushing Settings Volume of Air
Tube Length: 1m
140 cm3 /sample
Fixed time:
Chamber 2s, Tube 3s
100 cm3 /sample
Fixed time:
Chamber 2s,Tube “OFF”
10 cm3 /sample
Total Internal Volume: The total Internal Volume of the measurement system: 60cm3
Alarm Relay Socket: For connection to one or two alarm relays (visual/audio).
Alarm levels for each gas are user-defined.
System On/Running status available.
Max. 25 VDC, max.100 mA.
Back-up Battery: 3V lithium battery, lifetime 5 years. This protects data stored in memory, and powers the internal clock.

Height: 195 mm (7.68 in)
Width: 443 mm (17.44 in)
Depth: 244 mm (19.60 in)
Weight: 11 kg (24.3 lbs).

The monitor has three interfaces, USB, Ethernet, and RS-232, for data exchange and remote control of the 1512. The PC software communicates using the USB, Ethernet, or RS-232 interface.
Compliance with Standards
The 1512 has the following certifications:
  • CE-mark (for compliance with EMC and Low Voltage Directives),
  • NEMKO-mark (for compliance with UL and CSA standards)

Detection Limits

Converting concentration units

The detection limits in the Detection Limit Chart are given in "parts per million" by volume (ppm) at 20°C and 1 atmosphere of pressure. These values can be converted into the concentration unit "mg/m3" by using the equation below:

For a gas at 20 °C and at 1 atmosphere of pressure:
Concentration (mg/m3)= [Concentration(ppm) * Molec. weight (g/mol)] / [24.04 l/mol]

Detection limits for various gases
The gases below are just examples of the more than 300 different gases you can detect with our range of Gas monitors
Gas Detection limit (ppm) Filter number
SF6 0.006 UA0988
R134a 0.01 UA0971
Sevoflurane 0.006 UA0970
Ethylene Oxide 0.1 UA0978
Carbon Dioxide 1.5 UA0982
Nitrous Oxide 0.03 UA0985
Phosgene 0.02 UA0978

MultiPoint Monitoring


Optical Filters

See information on Detection Limits here

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