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Model 112 Fixed System PID

Product information

  • The Model 112 is a low cost continuous VOC Analyzer. It has an optional 4-20 mA output, a single programmable setpoint, larger pump & an industrial NEMA 4 enclosure.
  • This 112 the choice of one 9.5 or 10.6 eV lamp, Operator's Manual, configuration software and RS232 cable.
Model 112 Fixed System PID


Species measured

Organics (VOCs) and inorganic species that can be ionized by the UV lamp (9.5 or 10.6)


Sensor(s): single - PID only or FID only


+/- 1-2% of reading

Response time

<2 sec. (PID) < 10 sec. FID (to 90%) response

Sample flow rate

> 0.2 LPM

Span Drift

<2% over 24 hours


0.1 to 4,000 ppm (optional ppb range) - PID
1 to 20,000 ppm - FID

Linear Range

See range

Power consumption

< 1 watt maximum


90-220 VAC or 24 VDC


6.75'' W x 103/8''H x 63/4''D


7.4 pounds

Instrument operating conditions

5-40 degrees C, 0-95% RH (non-condensing)


Isobutylene Referred


PID Lamps

Our 9.5 and 10.6 eV lamps remain the best in the business since we developed them over 30 years ago.


Our compact FID is one of the most sensitive available.

Single piece construction

The single piece construction NEMA 4 enclosure constructed of fiberglass is waterproof, very rugged and durable.

Ease of calibration

The two point calibration for the PID uses an electronic zero (no zero gas needed) and a span gas. The time to calibrate is about 10 seconds. The Cal button is located on the main menu for ease of use. The FID requires zero air and span gas for calibration.


There are libraries for the 9.5 and 10.6 lamps that are easily accessible. There are more than 300 response factors built into the 112. Response factors are also built into the FID library.


Our 2 line by 16 character display is backlit. The upper display provides the concentration and the bottom display provides the lamp eV, FID, units, alarm and logging mode.


Our 16 bit ADC provides a resolution of 1 part in 64,000 and our signal algorithm minimizes noise by signal averaging in the msec range.

Programmable Voltage/current output

0-1VDC/4-20 mA

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