Product Description

The Protimeter HygroMaster 2 is the latest in handheld hygrometry, featuring a simple to use interface and multi-function capability.

Features of Protimeter BLD77550 & BLD7751 Hygromaster2

• Infra-red non-contact surface temperature
• Psychometric Calculations
• Data logging
• Simple to use interface with color display


• Fast temperature and humidity response
• Replaceable humidity and temperature sensor
• Highly accurate


• Flood damage restoration
• Building survey
• Concrete moisture
• HVAC test and measurement
• Commercial coatings


Protimeter BLD7750 & BLD7751 HygroMaster 2 – Specifications

Part Number Description 
BLD7750 & BLD7751 HygroMaster2
Gross Weigh 227g
Dimensions 178 mm X 81 mm X 38 mm
Display Colour LCD
Batteries (Incl.) 9V
Warranty 24 months on mechanical or manufacturing defects. Does not include wearing part or accessories.
Plug in Temperature Probe Surface Temperature Probe-BLD5805 Range 0°C to 70°C

Accuracy at 25°C ± 0.7°C

Infrared Surface Temperature Range IR Based – With 12:1 (D:S) Ratio
Range -20°C to 80°C
Accuracy ±2°C
Hygrostick Data (Nominal) 30% to 40% RH (±3% RH) at 20°C
41% to 98% RH (±2%) at 20°C.
Range 0°C to 50°C ±0.3°C
Quikstick and Quikstick ST Data (Nominal)


0% to 10% RH, ±3% RH at 20°C
10% to 90% RH, ±2% RH at 20°C
90% to 100% RH, ±3% RH at 20°C
Range 0°C to 50°C ±0.3°C
Nominal response 30% to 90% and back to 30% RH in 45 seconds 0°C
Data Storage Store up to 8,000 results with date and time stamp from all instrument functions with the push of a button. Store 6,100 results with automatic logging.

Data Sheet

Protimeter BLD7750 & BLD7751 HygroMaster 2 – Data Sheet

Protimeter BLD7750 & BLD7751 HygroMaster 2 Data Sheet


Protimeter BLD7750 & BLD7751 HygroMaster 2 – Accessories

Part Number Description
POL8751 Short Quikstick
POL4750 Hygrostick
BLD5808 Surface Temp Sensor
BLD7750-CKIT Flooring Kit
BLD5802 Humidity Ext Lead
BLD8755 30cm Humidity Probe
BLD7750-POU Carry Case


Protimeter BLD7750 & BLD7751 HygroMaster 2 – Video

The Protimeter Hygromaster L is a “lighter” version of the Hygromaster 2, but with the same great performance in accuracy and fast response! With a simple user interface and multi-function capability.

The Hygromaster L measures ambient humidity and temperature, dewpoint and specific humidity. It also incorporates a replaceable humidity and temperature sensor. This meter is ideal for flood damage restoration, building survey, concrete and concrete floor (in situ) moisture measurement.