Fixed dew-point meter DPS3

IP65with LCD displayhigh-accuracy

Description
The DPS3 is a heated dew point hygrometer with an integrated microprocessor control and a two‑stage chilled mirror sensor. It measures dew point in gas samples up to +95°C (203°F) and down to -40°C, and is supplied as a complete heated, temperature‑controlled NEMA‑4 / IP65 enclosure with sample flow control and heated sample line.

Overview
The DPS3 uses a two‑stage chilled mirror (rhodium coated) for a fundamental and highly repeatable dew point measurement. The heated sensor and heated enclosure prevent condensation when measuring dew points above ambient temperature. Microprocessor control regulates mirror temperature and provides automatic balance control for long‑term stability.

Standard Features

• Heated sensor temperature range: 20 to 99°C (68 to 210°F)
• Dew point measurement range: -35 to +95°C (-31 to 203°F)
• Measurement accuracy: ±0.2°C TP
• Resolution: 0.1°C
• Microprocessor controlled with user‑programmable temperature controller
• Integral adjustable flowmeter and sample valve
• Two alarm relays and selectable analog outputs (4–20 mA, 0–5 VDC, 0–10 VDC)
• RS232 output and 2‑row LCD display
• Sample connection: 1/4" compression fitting (≈6 mm) and 3 ft (≈0.9 m) heated sample line supplied
• Sample pressure tolerance: up to 10 bar (up to 150 psig noted for some configurations)
• AC power: 100–240 VAC, 50/60 Hz, 250 W

Technical specifications

• Measured parameter: Dew point (°C)
• Measurement method: Two‑stage chilled mirror (Dew Point Mirror)
• Measurement range: -40°C to +95°C (typical operating dew point range -35 to +95°C)
• Accuracy: ±0.2°C TP
• Resolution: 0.1°C
• Response time T90: ≈1°C / s
• Flow rate: 0.25 – 2.5 l/min
• Maximum sample pressure: 10 bar (configuration dependent; sample pressure up to 150 psig possible)
• Calibration: traceable moisture generator
• Outputs: selectable analog (4–20 mA, 0–5 VDC, 0–10 VDC), RS232, alarm relays
• Display: 2‑row LCD
• Enclosure/protection: NEMA‑4 / IP65
• Connection: 1/4" compression (≈6 mm)
• Supplied accessories: 3 ft (≈0.9 m) heated sample line, tubing and fittings
• Weight: approx. 3 kg

Application Areas

• Steel industry
• Furnace and heat‑treatment plants
• Food industry process control
• Semiconductor manufacturing and gas drying processes