MBW Chilled Mirror Hygrometers – Fast Delivery!

Lock In Your End-of-Year Hygrometer Special (6–8 Week Delivery) MBW Chilled Mirror Hygrometers now available for fast delivery before year-end - arriving in just 6–8 weeks!

Models:
Model 473 - For Humidity & Temperature Reference Dew Point Chilled Mirror up to 125°C
Model 973-SF6 - For Humidity Measurement in SF6 & SO2 in Gas Insulated Switchgears (GIS)

Advantages:
Laboratory-Grade Precision – The gold standard in dew point and humidity measurement.
Long-Term Stability – Confidence in every reading, year after year.
Trusted Worldwide – The choice for national standards laboratories and critical industries.
Low Maintenance Design – Reduce downtime and keep operations running smoothly.

Start 2026 with instruments engineered for excellence, dependability, and compliance.

MBW Calibration – Model 473 Dew Point Chilled Mirror Hygrometer

A cost-effective, high-performance chilled mirror hygrometer designed for accurate humidity and temperature reference measurements.

Key Features

• Precise chilled mirror dew point technology (±0.05°C uncertainty)

• Cable-mounted dew point & temperature probes (Pt-100 standard)

• Aspirated or direct insertion measuring heads

• Barometric pressure option

• Color touchscreen interface with user-verifiable calibration

• Rugged, portable design with IP65 transport case

Included

• 473 display & measuring head with cable

• Pt-100 temperature probe & cables

• Factory calibration certificate (ISO17025 optional)

• Transport case

Specifications

• Frost/dew point: –30 to +99°C (extended: –100 to +120°C, frost point to –110°C)

• Temperature: –50 to +100°C (with T12: –200 to +250°C)

• Fast response (~5 min for 90% RH step change)

Benefits

• Wide measurement range for multiple applications

• Real-time monitoring & low maintenance (easy mirror cleaning, self-diagnostics)

• Traceable to national standards with built-in data logging

• Connectivity via USB/Ethernet; supports Modbus & SCPI

Applications

• Climatic chamber validation (IEC60068)

• RH generator transfer standard (reduces calibration uncertainty by ~50%)

• Weather station & meteorological calibration

• Engine test cells, power generation, pharma, semiconductors, petrochemicals, HVAC, calibration labs

MBW Calibration – Model 973-SF6 Dew Point Chilled Mirror Hygrometer

An advanced analyzer for humidity, SF6 purity, and SO2 concentration in gas-insulated switchgear (GIS) and other high-voltage equipment. With internal gas containment and recovery, the 973-SF6 provides safe, environmentally responsible measurements in a single self-contained unit.

Why It Matters

• Pure SF6 can become contaminated with water vapor, leading to the formation of corrosive by-products (SO2, HF) under high-energy discharges.

• Low humidity in SF6 reduces this risk, making accurate, repeatable measurement essential for GIS maintenance.

• MBW pioneered SF6 analyzers with gas recovery to minimize emissions and environmental impact.

Key Features & Benefits

• Fundamental chilled mirror technique: stable, no routine sensor replacement, minimal recalibration.

• SO2 measurement option (0–100 ppm or 0–500 ppm), with individually calibrated sensors for accuracy ≤ ±2%.

• Rugged, portable design supplied in a Peli-Case with full accessory kit.

• Ideal for remote use: reduces downtime and service costs.

Specifications

• Frost/dew point: –50 to +20 °C (±0.5 °C)

• SF6 volume: 80–100% (±0.5%)

• Inlet pressure: 120–1,000 kPa abs. (±3 kPa)

• SO2 accuracy: ≤ ±2% of measured value

• ppmv/ppmw accuracy: ±1 ppm + 6% of reading

Applications

• Electrical power utilities

• Gas-insulated switchgear (GIS)

• SF6 gas manufacturers & suppliers

Included Standard Kit

• Peli-Case 1620, cables, USB adapter, software/manuals, country-specific power cable, SO2 module hex key, sterile swabs, calibration certificate

>> Read More: MBW Calibration