GMS Plus Gas Detection

Summary

Product identification

The GMS PLUS is a multi-function alarm system for measurement and regulation, designed as a two-channel measurement system for monitoring gases and temperatures in up to two rooms. It utilizes Chloratekt probes or other passive 4–20 mA probes for gas measurement, and Pt 1000 probes for ambient temperature.

Operating limits

• Operating temperature: 0 – 45 °C
• Relative air humidity: 15 – 90 % (non-condensing)

Feed water

Chloratekt probe

• Measured gases: Chlorine (Cl₂), Chlorine dioxide (ClO₂), Ozone (O₃)
• Measurement ranges:
  • Chlorine: 0 – 5 ppm or 0 – 20 ppm
  • Chlorine dioxide: 0 – 5 ppm or 0 – 20 ppm
  • Ozone: 0 – 1 ppm
• Response time (T90): ≤ 90 s
• Sensitivity: 0.1 ppm for gases
• Electrolyte tank filling: Approximately six months for Cl₂/ClO₂, three months for O₃.
• Protection rating: IP 20

Ambient temperature probe

• Type: Pt 1000
• Measurement range: 0 – 50 °C
• Sensitivity: 0.1 °C
• Protection rating: IP 65

Product water

(No specific product water parameters are detailed in the extract.)

Electrical

• Display: Backlit LCD, 2 x 16 characters, switchable units (ppm/ml/m³), 4 freely definable characters. Displays current, max, and average values over the last 8 hours. Menu-guided with clear text in five selectable languages.
• Digital inputs: 3 potential-free contact inputs (Door I & II, external alarm acknowledgement), 2 additional digital inputs for battery backup for 24 V devices. Detects mains failure, battery fault, and flat battery.
• Relay outputs:
  • 2 alarm contacts per measurement channel.
  • Alarm contacts for gas (2 "MAX" contacts).
  • Temperature alarm contacts (MIN and MAX).
  • 3 freely definable general alarms.
  • 1 cell fault for probe (dry electrode, cable break, etc.).
  • All alarms can be configured as NO/NC, latching/non-latching. Internal buzzer can be activated.
• Alarm contact setpoint: Continuously adjustable within the selected measurement range.
• Alarm delay: Continuously adjustable from 0 to 120 minutes.
• Relay contact electrical characteristics: Max. 1250 VA at 250 V AC; Max. 150 W at 30 V DC.
• Mains failure output: Possible via general alarm.
• Analog outputs (4 – 20 mA): 3 outputs for measured values on channels 1 and 2, temperature on channel 1. Load = 600 Ohm, potential-linked. Accuracy ± 0.5% of full scale.
• Power supply:
  • 200 – 240 V AC 50/60 Hz
  • 100 – 120 V AC 50/60 Hz
  • 24 V DC according to EN 61131 (18 – 30.2 V)
• Battery backup for 24 V devices:
  • 2 x 12 V 3 Ah lead-acid batteries.
  • Operating time during power failure: Minimum 10 hours.
• Interface: RS 232 or RS 485 for connecting Process Monitoring System or OPC-Server.

Mechanical / hydraulic

• Installation: Gas cells should be installed in the monitored room approximately 35 cm from the ground.
• Distance between cell and electronic module: Maximum 100 m.
• Protection rating (module): IP 66
• Weight (including packaging): Approx. 5.5 kg
• Dimensions (L x D x H): 320 x 310 x 175 mm

Controls and markings

• CE Conformity: (89/336/EEC)
• Electromagnetic compatibility: According to EN 61326.
• Electrical safety: According to EN 61010.
• Suitable for: Industrial, residential, and commercial areas.

Disclaimer This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror