Greisinger GMH 3511 pH, Redox (ORP), Temperature Combination Measuring Device 610880

In water treatment plants, laboratories, and field service, technicians rely on the Greisinger GMH 3511 to capture pH, redox (ORP), and temperature with a single handheld meter. The 3-line LCD shows all three values simultaneously, while automatic or manual temperature compensation keeps readings accurate across changing conditions.

Key specifications

• pH measuring range: 0.00 to 14.00 pH, resolution 0.01 pH, accuracy ±0.02 pH (±1 digit)
• Redox (ORP) measuring range: -1999 to +2000 mV, resolution 1 mV, accuracy ±0.1% FS (±1 digit)
• Temperature measuring range: -5.0 to +150.0 °C, resolution 0.1 °C, accuracy ±0.2 °C (at 25 °C)
• Automatic or manual temperature compensation with Pt1000 sensor
• 1, 2, or 3-point automatic calibration
• Data logger capacity: up to 10,000 data sets (manual or cyclic)
• Serial interface (RS232 via 3.5 mm jack)
• Power supply: 9V battery or external 10.5-12V DC
• Battery life: approx. 3000 hours with alkaline battery
• Protection class: IP65
• Electrode connection: BNC (pH/Redox), 2-pin mini-DIN (Pt1000)
• Min/Max value memory, Hold function, Auto-Off

Why choose it

Rugged and precise, the GMH 3511 combines three essential water quality parameters in one IP65-rated housing. Its large data memory and serial output simplify documentation and transfer to a PC.

Ideal use cases

• Wastewater and drinking water analysis
• Aquaculture and environmental monitoring
• Laboratory quality control
• Field measurements in harsh conditions

Good to know

The device operates from 0 to +50 °C and supports a Pt1000 temperature probe for automatic compensation. A 9V battery or external DC supply powers the meter.