Z Pump Model Hydrogen Sulfide Monitor
Pump Model Hydrogen Sulfide Monitor Image

  • Easy to Use

  • Internal Pump

  • Rechargeable Battery

  • Short and Long Term Averaging

  • Internal Memory (Data Logging)


Environmental Sensors Company’s Z-900XP is a portable desktop instrument for monitoring hydrogen sulfide concentrations in air with a resolution of 0.1 ppm and a range 0-200 ppm. The LCD display outputs the concentration (in ppm) every 10 seconds. The instrument also computes a 15-minute average and a Time Weighted Average (updated hourly for up to 8 hours). These values can be viewed anytime during the measurement procedure. The internal pump combined with the extendable probe makes it possible to sample from hard-to-reach areas or confined spaces.

With the data-logging feature enabled, the meter will store all of the exposure points for each use. The maximum storage capacity is 14,400 data points. This is the equivalent of 5 separate 8-hour uses. The data is easily uploaded to PC using components available within the Microsoft Windows Operating System or the terminal software included with the instrument.


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 hydrogen sulfide in air.



PERFORMANCE DATA

Sensor
Nominal Range
Sensor Resolution
Response Time
    (90% Peak)
Repeatebility
Sensitivity Loss
Operating Temperature
Pressure Range
Relative Humidity
Dimensions

Weight
Power Source

Battery Life
Sensor Life
Electrochemical
0-200
0.25 ppm
<35 Seconds

1% of output
<2% per month
-40 to +50°C
Atmospheric ±10%
15-90% non-condensing
HxDxW
7.5"x5.75"x2.75"
900 gms
Internal Rechargeble Battery
or AC Adapter
9 hours (operating time)
2+ years



Some representative examples of the common compounds and the corresponding signals they give are shown below. For example, the output is less than 1.5 ppm when exposed to 300 ppm carbon monoxide in air. Care needs to be exercised about using this instrument in the presence of large concentrations of these gases.


CROSS SENSITIVITY DATA
Gas
Actual Concentration
Z-900XP-hr Output
Carbon Monoxide
Sulfur Dioxide
Nitric Oxide
Nitrogen Dioxide
Chlorine
Hydrogen
Hydrogen Cyanide
Hydrogen Chloride
Ethylene
300 ppm
5 ppm
35 ppm
5 ppm
1 ppm
10,000 ppm
10 ppm
5 ppm
100 ppm
<6 ppm
<1 ppm
0 ppm
-1 ppm
-0.1 ppm
<15 ppm
0 ppm
0 ppm
0 ppm