Chemiluminescence NH3 Analyzer: Model 201E0 pages

MODELS 201E

Chemiluminescence NH3 Analyzer
for Ambient Air Quality Monitoring
The Model 201E analyzer measures ambient ammonia in
selectable ranges from 0-50 ppb to 0-2,000 ppb using
the chemiluminescence principle and a Teledyne API
designed external ammonia converter and sampling
system. Ranges are user selectable in 1 ppb increments
and auto ranging is available.
Ammonia is difficult to measure accurately because of a
tendency to be absorbed into other materials. The
“stickiness” of the gas results in slow response times and
inaccurate concentration values. The Model 201E has
0-50 ppb to 0-2,000 ppb, user selectable

been designed to overcome the problems of ammonia

Microprocessor controlled

gas analysis through increased flow, minimum surface

Multi-tasking software allows viewing of test
variables during operation

area and selected construction materials.

Continuous self checking with warning
alarms

converter, which converts NH3 and other compounds to

In operation, sample gas is passed through the 501NH

NO, producing the total oxides of nitrogen (TNX). In the
External converter

next cycle the sample is routed through a molybdenum

Designed to optimize response times

converter which converts nitrogen oxides (less NH3) to

– Minimal surface area in contact with
sample

NO, producing the Tn reading. The difference between

– low absorption wetted parts
– heated zero/span manifold

these readings (TNX – TN = NH3) provides a reading
proportional to the NH3 concentration. The analyzer
software represents these values in the readout, and

Continuous Automatic Zero correction
Adaptive signal filtering optimizes response
time

independent outputs are available for each of these
values.
The Model 201E combines the performance advantages

Temperature & pressure compensation
Internal data logging with 1 min to 24 hour
averages

of Teledyne API’s Model 200E NO/NOX analyzer with a
converter sampling system designed specifically for this
application to produce the most accurate and
dependable NH3 measurement system available today.

FREE Customer Support by telephone and email for the life of the instrument