Yokogawa ANB10D-42M

Digital guide

Product Introduction:
The ANB10D-42M is an intelligent pH/ORP (Oxidation-Reduction Potential) transmitter from Yokogawa’s AN Series, designed for panel mounting. It features a 4-20mA analog output and 2 relay alarm outputs, with built-in temperature compensation. It supports both pH and ORP measurement modes and is widely used in online water quality analysis across water treatment, chemical, food, and other industries.

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Detailed content

Technical Specifications:

Parameter	Specification
Measured Parameters	pH / ORP (switchable)
pH Range	-2.00 to +16.00 pH
pH Accuracy	±0.02 pH (within 0 to 14 pH range)
ORP Range	-1500mV to +1500mV
ORP Accuracy	±2mV
Temperature Compensation	Built-in Pt1000 sensor, ATC (Automatic) or MTC (Manual)
Analog Output	4-20mA DC (load ≤600Ω)
Relay Outputs	2 sets (Alarm 1 + Alarm 2)
Relay Capacity	250V AC / 3A, 30V DC / 3A
Communication Interface	RS-485 (Modbus RTU, optional)
Power Supply	100-240V AC (50/60Hz)
Power Consumption	Approximately 8W
Operating Temperature	0°C to +50°C
Protection Rating	IP65 (front panel)

Material Composition:

Front Panel: PC (Polycarbonate) + ABS frame
Electrode Interface: PVDF corrosion-resistant material
Housing Seal: EPDM rubber gasket

Structural Features:

96mm × 96mm standard panel mount size (DIN 96×96 compliant)
Front panel with 4-digit LCD display
4 push buttons for parameter setting and operation
Top-mounted electrode terminal block and signal output terminals

Working Principle:
The ANB10D-42M measures the potential difference (mV) generated by the pH glass electrode in response to hydrogen ion activity in the solution. The potential signal is converted to a pH value using the Nernst Equation. For ORP measurement, a platinum electrode measures the solution’s oxidation-reduction potential. The built-in temperature sensor detects solution temperature, and automatic temperature compensation is applied using the Nernst temperature coefficient to ensure measurement accuracy across different temperatures. The measured result is converted via A/D conversion to a 4-20mA output signal, while simultaneously comparing against set upper/lower limits to trigger relay alarms.

Functional Features:

Dual-mode: pH/ORP in one unit, switchable via parameter setting
Supports 2-point calibration (up to 5-point calibration optional)
Relay alarms support upper limit / lower limit / deviation three modes
Supports manual/automatic temperature compensation switching
Electrode aging diagnosis function prompts electrode replacement

Advantages & Highlights:

High-precision pH measurement (±0.02pH) meets stringent process requirements
Panel mount design suitable for local display at the field
2 independent relays allow different alarm values to be set
Simple operation: 4 buttons complete all settings
Excellent long-term stability: drift less than 0.05pH/24h

Applicable Industries:

Municipal water/wastewater treatment plant pH monitoring
Chemical industry acid-base neutralization process control
Food & beverage cleaning solution pH monitoring
Power plant boiler feedwater/condensate pH detection
Semiconductor industry ultrapure water pH monitoring

Installation Requirements:

Panel cutout dimensions: 92mm × 92mm (DIN 96×96 standard)
Recommended installation height: 1.2m to 1.8m from ground level (center of instrument)
Electrode installation: use flow-through or immersion type, ensure electrode bulb fully contacts measured liquid
Use shielded cable for signal wiring; ground shield at one end only
Power wiring: use 1.5mm² or larger conductors

Usage Precautions:

Calibrate pH electrode daily, minimum once per day
Electrode must be stored immersed in 3mol/L KCl solution; never store dry
Avoid contact with extreme pH solutions (pH<1 or pH>12) where measurement error increases significantly
Set appropriate hysteresis for relay alarms to prevent relay chattering
Electrode service life: approximately 1-2 years, replace periodically