The HD-480 is a compact panel-mount dissolved oxygen meter from HORIBA's 48/96 Series, designed for aeration tank management at wastewater treatment plants and industrial wastewater facilities. Based on the galvanic cell method with probe DP-100 and sensors 5400/5405, it provides continuous DO monitoring in a cost-effective 48 × 96 mm DIN panel-integrated configuration. A single isolated 4–20 mA output, two relay contact outputs with ON/OFF DO control, air and solution calibration with salinity compensation, and comprehensive self-diagnostics make it a capable and low-cost alternative to field-mount DO transmitters where indoor panel installation is preferred.
The HD-480 is a panel-mount dissolved oxygen meter from HORIBA's 48/96 Series, offering a cost-effective solution for aeration tank management in wastewater treatment plants and industrial wastewater facilities. Using the galvanic cell method with probe DP-100 and sensors 5400/5405, it provides reliable continuous DO monitoring in a compact 48 × 96 mm DIN panel enclosure — reducing installation costs compared to a field-mount transmitter while delivering standard DO measurement and control functionality. A single isolated 4–20 mA output and two configurable relay contact outputs support DO-based ON/OFF aeration control and alarm functions. Air and solution calibration with salinity compensation (0–5%) ensure measurement accuracy across a range of water types. Comprehensive self-diagnostics cover calibration errors, sensor faults, and instrument errors.
Key Features HD-480
- Galvanic cell method — reliable DO measurement with probe DP-100 and sensors 5400/5405.
- DO range 0–20 mg/L (0.01 mg/L resolution); saturation 0–200% (1% resolution); temperature 0–40 °C (0.1 °C resolution); repeatability and linearity ±0.5% FS.
- Single isolated 4–20 mA DC output (max. 900 Ω); freely settable output range within measurement range.
- Two relay contact outputs (SPDT 1c, 240 V AC / 30 V DC, 3 A): selectable as upper/lower limit alarm, ON/OFF DO control, anomaly alarm, or maintenance mode.
- Salinity compensation 0.0–5.0%; air and solution calibration; 2-point temperature calibration.
- Self-diagnostics: calibration zero/sensitivity errors; temperature sensor short-circuit/disconnection; measuring range error; product error.
- Panel face IP65; rear case IP20; terminals IP00; ABS panel case; Class II device IEC61010-1, Pollution Level 2.
- Compact 48 × 96 mm DIN format; approx. 400 g; cost-effective panel installation.
- CE marked: EN61326-1, EN61010-1, RoHS EN50581; FCC Part 15 Class A.
Applications
The HD-480 is suited to continuous DO monitoring and ON/OFF aeration control in municipal and industrial wastewater treatment aeration tanks, and process water management applications where a panel-integrated DO transmitter offers installation cost savings over a field-mount unit.
Installation and Safety Notes
Install into a standard 48 × 96 mm panel cutout. Power: 100–240 V AC, 50/60 Hz, 10 VA max. Panel face IP65; rear case IP20; terminals IP00. Operating temperature −5 to 45 °C; storage −25 to 65 °C; humidity 20–85% RH non-condensing. Compatible sensors: probe DP-100 (0–45 °C operating); sensors 5400/5405.
Technical Specifications
| Parameter | Dissolved Oxygen (DO), Saturation, Temperature |
| Measurement method | Galvanic cell method |
| Compatible probe / sensors | Probe DP-100 (0–45 °C); sensors 5400, 5405 |
| DO range | 0–20 mg/L; resolution 0.01 mg/L |
| Saturation range | 0–200%; resolution 1% |
| Temperature range | 0–40 °C; resolution 0.1 °C |
| Repeatability / Linearity | Within ±0.5% FS |
| Transmission output | 1 × 4–20 mA DC, isolated; max. 900 Ω; free range setting |
| Contact output | 2 × relay SPDT (1c); 240 V AC / 30 V DC, 3 A; upper/lower alarm, ON/OFF control, anomaly alarm, maintenance |
| Salinity compensation | 0.0–5.0% |
| Calibration | Air calibration; solution calibration; 2-point temperature calibration |
| Temperature compensation range | 0–40 °C |
| Power supply | 100–240 V AC, 50/60 Hz, 10 VA max. |
| Operating temperature | −5 °C to 45 °C |
| Storage temperature | −25 °C to 65 °C |
| Humidity | 20–85% RH (non-condensing) |
| Protection rating | Panel face IP65; rear case IP20; terminals IP00 (IEC60529 / JIS C0920) |
| Installation type | Indoor panel-mount (48/96 Series, DIN 48×96 mm) |
| Housing material | ABS (panel case); PBT (terminals) |
| Dimensions (W × H × D) | 48 × 96 × 115 mm (case depth approx. 105 mm) |
| Weight | Approx. 400 g |
| Compliance | CE (EN61326-1, EN61010-1, RoHS EN50581); FCC Part 15 Class A; Class II device IEC61010-1; Pollution Level 2 |
| Manufacturer | HORIBA Advanced Techno Co., Ltd. |
| Brand | Horiba |
