Greisinger GMH5530-G135 pH, ORP, Temperature Combination Meter 483930

The GMH5530-G135 combines pH, redox (ORP), and temperature measurement in a single handheld instrument, eliminating the need to switch between separate meters. Its backlit graphic LCD and three-point calibration set it apart from basic pH testers.

Highlights

• Measures pH from -2.00 to 16.00 with 0.01 resolution and ±0.01 accuracy
• ORP range -2000 to +2000 mV with ±0.1% FS accuracy
• Temperature measurement from -5.0 to +150.0 °C with 0.1 °C resolution
• Manual data logger stores 1000 values, cyclic mode stores 10000
• USB interface for data transfer and external power
• IP65 front protection for field use

In daily use

The instrument supports 1, 2, or 3-point pH calibration and automatic temperature compensation. Min/max memory, hold, and alarm functions help capture critical measurements. Power comes from two AAA batteries or USB, with battery life up to 250 hours without backlight.

Full specifications

• pH measuring range: -2.00 to 16.00 pH
• pH accuracy: ±0.01 pH at 25 °C
• pH resolution: 0.01 pH
• ORP measuring range: -2000 to +2000 mV
• ORP accuracy: ±0.1% FS ±1 digit
• ORP resolution: 1 mV
• Temperature measuring range: -5.0 to +150.0 °C
• Temperature accuracy: ±0.2 °C at 25 °C
• Temperature resolution: 0.1 °C
• Display: backlit graphic LCD
• Data logger capacity: 1000 manual / 10000 cyclic values
• Interface: USB
• Power supply: 2 x AAA batteries or external 5V DC via USB
• Battery life: approx. 250 hours without backlight
• Sensor connection: BNC for pH/ORP, 2x 4-pin Mini-DIN for temperature
• Protection class: IP65 front side
• Operating temperature: 0 to +50 °C
• pH calibration: 1, 2, or 3-point
• Special features: Min/Max value memory, Hold function, ATC, alarm function

Final note

A versatile meter for laboratory and field applications where pH, redox, and temperature must be monitored together.