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Formaldehyde Monitor Z-300XP

Model Z-300XP
Formaldehyde Monitor

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Theory of Operation

The sensing element of the instrument is an electrochemical cell. The cell is a four-electrode type, which contains a working and an active auxiliary electrode. The signal from the auxiliary electrode is used for temperature compensation and to improve the selectivity of the entire sensor. The sensor response is linear with the concentration of the target gas in air.


Gas as formaldehyde
w/o filters
as formaldehyde
with filters


2 ppm

2 ppm

Methylethyl Keton

2 ppm

0 ppm

Diethyl Detone

2 ppm

2 ppm


12 ppm

0 ppm

Acetic Acid

0 ppm

0 ppm


67 ppm

0 ppm


125 ppm

0 ppm


55 ppm

0 ppm


44 ppm

0 ppm

Carbon Monoxide 40 ppm 0 ppm


  • Portable
  • Internal Pump
  • Rechargeable Battery
  • Remote Sampling
  • Simple to Use
  • TWA, STEL and Peak
  • Audible Adjustable Alarm
  • Data Logging


Environmental Sensors Co.'s Formaldehyde Meter is a portable desktop instrument that measures formaldehyde concentration in a range of 0-30 ppm and a resolution of 0.01ppm.

The instrument makes it possible to monitor formaldehyde vapor in air. The insturment has an LCD display giving concentrations in ppm every 10 seconds, a low battery indicator, and an audible alarm that can be set at any level from 0-30 ppm.

With the touch of a button, the meter displays STEL (average of every 15 min.), TWA (8 hour average) and Peak.

The internal pump makes it possible to sample from hard-to-reach areas or confined spaces by attaching a flexible tube to the meter.

Data Logging

The Z-300XP meter stores all of the exposure points for up to 5 logs (a log is created in the instrument's internal memory each time it is used). A log contains: date, time, number of exposure points, the interval between each point, and the actual exposure points. All of the log files can be easily uploaded to PC using components vailable within the Microsoft Windows Operation System or the termianl software included with the instrument.

Filter Technology Eliminates Interferences

The Z-300XP formaldehyde monitor uses an active filter to eliminate potential interference from common chemicals. With no filter in place, the sensor is exposed to formaldehyde and the chemicals that may interfere. When the filter is added, the formaldehyde is removed. The instrument then accurately determines the difference in the signal from the sensor. This is proprtional to the amount of formaldehyde, with elimination of potential interference from other chemicals. The procedure is automatic when the command to measure is given.

Meter Spec

Sensor Type Electrochemical

Nominal Range

0-30 ppm


34 ppm

Sensor Life

> 2 years


0.01 ppm

Min. Detectable

0.01 ppm

Response Time

< 60 sec.

Warm-Up Time

60 sec.

Operating Temperature

0 °C to 40 °C

Pressure Range

Atm ± 10%

Relative Humidity

15 - 90 % non-condensing


Audible 80db


H x D x W: 7.5" x 5.75" x 2.75"


900 grams


Internal Rechargeable Battery or AC Adaptor


One Year
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