Threaded dew-point transmitter LDT

NPT 1/21/2" UNFDN20 - 3/4"

Overview
The LDT process dewpoint transmitter is a compact, industrial-grade sensor for continuous monitoring of dewpoint in gas lines and process enclosures. Housed in stainless steel with IP65 protection, it is designed for harsh environments and offers both an analog 4–20 mA current loop and a HART digital interface.

Analog and Digital Outputs
The unit provides a linear 4–20 mA (2‑wire) output across the full measurement range and supports HART for remote readout of dewpoint, temperature and diagnostics. Supply voltage: 5–28 VDC (non-isolated).

Sensor Technology
The LDT uses a high‑capacity nano‑pore sensor delivering fast response and long-term stability. Available measurement ranges cover -110°C to +20°C dewpoint, with mirror calibration option for traceable verification.

Standard features

• Compact stainless steel enclosure, IP65
• Wide measuring range: -110°C dewpoint
• Fast response time (T90 ≈ 60 s from +20°C to -40°C)
• 2‑wire 4–20 mA transmitter with HART
• M12x1 electrical connector
• Long-term stability and mirror calibration

Application areas

• Semiconductor manufacturing
• Pharmaceutical production
• 3D printer gas supply and control
• Industrial gas manufacturers and dryers
• Glovebox and controlled-atmosphere enclosures

Technical specifications

• Parameter measured: Dewpoint (°C)
• Sensor method: Nano‑pore
• Measuring range: -110°C to +20°C dewpoint
• Accuracy: ±2 °C (dewpoint)
• Response time (T90): +20°C to -40°C ≈ 60 s
• Analog output: 4–20 mA (2‑wire)
• Digital interface: HART (dewpoint, temperature, diagnostics)
• Supply voltage: 5–28 VDC (non‑isolated)
• Resolution: per measurement range (analog)
• Flow rate: approx. 1 l/min
• Maximum pressure: 345 bar
• Calibration: Mirror
• Gas temperature range: -40 to +70 °C
• Display: none
• Protection class: IP65
• Connections: ¾” UNF, ½” NPT
• Dimensions: 9 cm
• Weight: 0.3 kg