Greisinger GMH3692 happimittari (606842)

The GMH3692 stands out by measuring both gaseous and dissolved oxygen with a single handheld unit, using galvanic sensors that require no polarization time. Its 4½-digit LCD offers clear readings, while automatic temperature compensation and manual pressure input ensure accurate results across varying conditions.

Highlights

• Dual measurement: 0.0–100.0 % O2 (gas) and 0.00–20.00 mg/l (dissolved)
• High accuracy: ±0.1 % O2 ±1 digit for gas; ±1.5 % of measured value ±0.2 mg/l for dissolved
• Fast response: T90 < 10 seconds with GWO 3690 sensor
• Min/Max memory, Hold, Auto-Off, and battery warning
• Galvanically isolated serial interface for data logging

In daily use

The GMH3692 is suited for field and laboratory applications where oxygen concentration must be monitored quickly and reliably. Calibration is straightforward with 1-point or 2-point methods using air or zero point. The impact-resistant ABS housing and IP65 front protection withstand demanding environments.

Full specifications

• Measurement range (gas): 0.0 to 100.0 % O2
• Measurement range (dissolved): 0.00 to 20.00 mg/l O2
• Resolution (gas): 0.1 % O2
• Resolution (dissolved): 0.01 mg/l O2
• Accuracy (gas): ±0.1 % O2 ±1 digit
• Accuracy (dissolved): ±1.5 % of measured value ±0.2 mg/l
• Display: 4½-digit LCD
• Operating temperature (device): -20 to +50 °C
• Power supply: 9 V battery (IEC 6F22) or 10.5-12 V DC adapter
• Battery life: approx. 3000 hours (alkaline)
• Interface: serial, galvanically isolated
• Housing material: impact-resistant ABS plastic
• Protection class: IP65 (front side)
• Sensor compatibility: galvanic oxygen sensors (e.g., GWO 3690, GOEL 370)
• Temperature compensation: automatic (external sensor) or manual
• Pressure compensation: manual input
• Calibration: 1-point or 2-point (air/zero point)
• Response time (T90): < 10 seconds with GWO 3690

Final note

The GMH3692 is delivered as device only; sensors and accessories are sold separately.