The HE-480R is a compact panel-mount resistivity meter from HORIBA's 48/96 Series, designed for continuous monitoring of ultrapure water quality in semiconductor, electronics, food, and pharmaceutical manufacturing. Using the 2-electrode method with ERD and ERF Series sensors (cell constant 0.01 /cm), it measures resistivity up to 20.00 MΩ·cm (100.0 MΩ·cm without temperature compensation), with high-precision temperature compensation based on extra deionised water characteristics (reference temperature 25 °C). UPW standard resistivity input, clipping function, a single isolated 4–20 mA output, and two relay contact outputs are provided in a 48 × 96 mm DIN enclosure with IP65 panel face.
The HE-480R is a panel-mount resistivity meter from HORIBA's 48/96 Series, purpose-built for continuous ultrapure water monitoring in semiconductor, electronics, food, and pharmaceutical manufacturing. It uses the 2-electrode method with ERD and ERF Series resistivity sensors (cell constant 0.01 /cm) and features high-precision temperature compensation based on extra deionised water characteristics (reference temperature 25 °C), minimising fluctuation caused by sudden changes in water temperature. UPW standard resistivity input (selectable from recognised standards), a clipping function, and a single isolated 4–20 mA output with two configurable relay contacts make it a complete panel-integrated resistivity measurement solution. The panel face carries an IP65 rating and the instrument fits a standard 48 × 96 mm DIN cutout.
Key Features HE-480R
- High-precision temperature compensation based on extra deionised water characteristics (ref. 25 °C) and user-defined coefficient — minimises measurement error during sudden water temperature changes.
- Compatible with ERD and ERF Series 2-electrode resistivity sensors (cell constant 0.01 /cm).
- Resistivity range 0–20.00 MΩ·cm / 0–200.0 kΩ·cm; without temperature compensation: up to 100.0 MΩ·cm display.
- UPW standard resistivity input: 18.23 MΩ·cm (standard), 18.18 MΩ·cm, 18.24 MΩ·cm / 182.3 kΩ·m (standard), 181.8 kΩ·m, 182.4 kΩ·m — selectable.
- Clipping function: measured value held at user-defined ceiling when exceeded.
- Single isolated 4–20 mA DC output (max. 900 Ω); free range setting; hold options (previous value, optional value, continuous).
- Two relay contact outputs (SPDT 1c, 240 V AC / 30 V DC, 3 A): R1/R2 selectable as upper/lower limit alarm, ON/OFF control, or maintenance.
- Panel face IP65 (IEC60529 / JIS C0920); rear case IP20; ABS panel case; PBT terminals; Class II device IEC61010-1, Pollution Level 2.
- CE marked: EN61326-1, EN61010-1, RoHS EN50581; FCC Part 15.
Applications
The HE-480R is suited to continuous resistivity monitoring of ultrapure water in semiconductor and electronics manufacturing, pharmaceutical WFI and purified water systems, food and beverage high-purity water, and any application requiring panel-integrated resistivity measurement with UPW-grade temperature compensation.
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 — protect the rear from moisture. Operating temperature −5 to 45 °C; storage −25 to 65 °C; humidity 20–85% RH non-condensing.
Technical Specifications
| Parameter | Resistivity, Temperature |
| Measurement method | 2-electrode resistivity (ERD/ERF Series, cell const. 0.01 /cm) |
| Resistivity range | 0–0.200 / 0–2.00 / 0–20.00 MΩ·cm; 0–2.00 / 0–20.0 / 0–200.0 kΩ·m; up to 100.0 MΩ·cm (no temp. comp.) |
| Temperature range | 0–100 °C; resolution selectable (0, 1, or 2 decimal places) |
| Repeatability / Linearity (resistivity) | Within ±0.5% FS |
| Temperature compensation | Extra DI water characteristics (ref. 25 °C) / user-defined coefficient (ref. 5–95 °C) / none; Pt 1 kΩ; 0–100 °C |
| UPW standard resistivity input | 18.23 / 18.18 / 18.24 MΩ·cm; 182.3 / 181.8 / 182.4 kΩ·m (selectable) |
| Clipping function | Display held at user-defined ceiling when measured value exceeded |
| 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, maintenance |
| 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 II device IEC61010-1; Pollution Level 2 |
| Manufacturer | HORIBA Advanced Techno Co., Ltd. |
| Brand | Horiba |
