Orion 250A | Water Monitoring | Water Quality Instruments

Model 250Aplus - Advanced Portable pH MeterModel 250Aplus

• 3 Point pH Manual and Autocalibration
• New EH ORP mode correlates measurements to Standard Hydrogen Electrode (SHE)
• RS232 Communication and Datalogging Capability

The Model 250Aplus is a multi-purpose, pH meter for one-handed field operation, featuring built-in electrode storage sleeve with cable management. Calibration is fast, easy and accurate using two-step autocalibration (built-in Auto-Buffer-Recognition of three buffers) and automatically calculated and displayed electrode slope value. The mV mode allows quick and easy ORP measurements. Meter provides choice of speed or accuracy with selectable resolution and simultaneous display of both pH and temperature. The Model 250Aplus features RS232 communication for connection to optional Thermo Orion Model 900A printer or computer. New ORP Mode allows standardization to the Standard or Normal Hydrogen Electrode used to define Oxidation Reduction Potential (ORP). Three (3) year meter warranty.

0250A3 Starter Kit contains: Replaceable 9 V battery. For 110V, 220V or 240V operation, order line adapter separately.

0250A5 Aquapro pH Kit contains: 9156AP pH electrode, 917007 ATC probe, buffers, beaker, stand, electrode holder, and field case.

Specifications

• pH Range 2.00 to 19.99
• pH Resolution 0.01/0.1
• pH Relative Accuracy
• pH slope 80 to 120%
• pH Auto-Buffer-Recognition 4.01, 7.00, 10.01
• pH Calibration Points 3
• Temperature Range -5.0 to 105.0°C
• Temperature Resolution 0.1°C
• Temperature Relative Accuracy ± 0.1°C
• Millivolt Range ± 1600.00 mV
• Millivolt Resolution 0.1 mV
• Millivolt Relative Accuracy ± 0.2 mV or ± 0.05% of reading, whichever is greater
• EH ORP Mode Yes
• Relative Millivolt Range ± 1999.9 mV
• Relative Millivolt Resolution - 0.1 mV
• Relative Millivolt Relative Accuracy ± 0.2 mV or ± 0.05% of reading, whichever is greater
• Display Custom LCD
• Inputs 1 BNC, 1 pin tip, ref, ATC, power
• Outputs RS232
• Power Requirements One 9 V alkaline/lithium battery, or line adapter for 110V, 220V, or 240V
• Agency Approvals CE, CSA, UL
• Environmental Requirements 5°C to 45°C and 5 to 85% relative humidity, non-condensing