GPR-7500 (A)IS Online H2S Analyzer
Online ppm hydrogen sulphide analyzer with electrochemical sensor, certified for flammable gas streams.

Landfill gas extraction monitor measuring CH4, CO2 and O2 to balance the gas field and maximise CH4 revenue.
The Geotech GEM5000 landfill gas extraction monitor measures CH4, CO2 and O2. It is an easy to use analyser designed to aid balancing of the gas field, maximise power output and ultimately maximise revenue from CH4 extraction. It records static and differential pressure and can calculate gas flow and calorific value with an external flow device.
CH4 and CO2 are measured by a dual-wavelength infrared sensor with reference channel; O2 and optional CO (H2 compensated), H2S, NH3 and H2 by internal electrochemical sensors. An internal pump (550 ml/min typical) draws the sample from the extraction well or pipework.
| CH4 | 0–100 % (±0.5 % vol 0–70 %; ±1.5 % vol 70–100 %) |
|---|---|
| CO2 | 0–100 % (±0.5 % vol 0–60 %; ±1.5 % vol 60–100 %) |
| O2 | 0–25 % (±1.0 % vol) |
| Ranges | H2S 0–50 ppm up to 0–10,000 ppm; CO 0–500/1,000/2,000 ppm (H2-compensated option); NH3 0–1,000 ppm; H2 0–1,000 ppm |
|---|
| Response T90 | CH4/CO2 ≤ 10 s; O2 ≤ 20 s; H2S/CO ≤ 30 s; NH3/H2 ≤ 90 s |
|---|
| Flow | 550 ml/min typical |
|---|---|
| Flow Fail Point | -200 mbar vacuum, user settable |
| Battery | Rechargeable NiMH pack, typical use 8 hours |
|---|---|
| Charger | Mains 100–240 V, approx. 4 h charge |
All Tetracon-supplied instruments carry the original manufacturer warranty (typically 12–24 months) plus first-line local support from our Islamabad service centre.
Yes. Our manufacturer-trained engineers offer on-site installation, commissioning and startup training anywhere in Pakistan.
Common spares are held in local stock. Calibration is available at our lab or on-site with NIST-traceable reference standards.
Stocked items ship within 3–5 working days; engineered configurations typically 6–10 weeks depending on manufacturer schedule.
Complete the form below and one of our engineers will respond within 1 working day with pricing and lead time. Prefer email? Contact our sales team.