INSTRUCTIONS
Volumetric Infrared Hydrocarbon
Gas Process Monitor
for Heavy Hydrocarbons
PIRVOLHV
APPLICATION
PIRVOLHV is a point-type infrared hydrocarbon
gas process monitor. It provides a continuous 4-20
milliampere (mA) output signal that is proportional to
propane vapor concentrations from 0 to 100% by volume.
PIRVOLHV is designed for use in extractive vapor
sampling systems where the vapor concentration is likely
to be above the lower flammability limit (LFL). Typical
applications for the PIRVOLHV include hydrocarbon well
logging and petroleum exploration where a volumetric
measurement of the target gas is required.
PIRVOLHV is furnished with a sealed aluminum or stainless
steel vapor sampling enclosure. Brass compression-
type tubing fittings on the enclosure (for use with 0.25
inch o.d. tubing) allow easy connection to the inlet and
exhaust lines of the vapor sample extraction system.
PIRVOLHV is CSA certified for use in Class I, Division 1,
Groups B, C and D; and Class I, Division 2, Groups A, B,
C and D areas.
FEATURES
• Routine calibration not required.
• Continuous self-test automatically indicates a fault or
fouled optics condition.
• Performs well in the presence of high concentrations
or constant background levels of hydrocarbons and
in oxygen depleted atmospheres.
• There are no known poisons, e.g. silicones or
hydrides, that compromise the integrity of the
measurement.
SPECIFICATIONS
INPUT VOLTAGE—
24 Vdc nominal. Operating range is 18 to 32 Vdc including
ripple.
POWER CONSUMPTION (WATTS)—
Input Voltage:
18 Vdc
24 Vdc
32 Vdc
Nominal 3.5 4.6 6.2
Maximum 4.0 5.5 7.0
DETECTION RANGE—
0 to 100% by volume propane.
DETECTABLE GASES—
PIRVOLHV responds to most hydrocarbon gases,
however, the signal processing program is only accurate
for propane.
ACCURACY—
(Det-Tronics verified)
±1% v/v from 0 to 10% v/v
±5% v/v from 10 to 50% v/v
±8% v/v from 50 to 90% v/v
±13% v/v from 90 to 100% v/v.
3 .1
©Detector Electronics Corporation 2012
Rev: 1/12 95-8632
