80 YEARS · 1946-2026
Protimeter BLD7750 & BLD7751 HygroMaster 2
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About this product

The Protimeter HygroMaster 2 (BLD7750 and BLD7751) is a handheld hygrometer for measuring ambient relative humidity, temperature and related psychrometric values, with non-contact infra-red surface temperature included. The Protimeter HygroMaster 2 is used to record the climatic conditions that govern whether surfaces are fit to coat and whether buildings are drying correctly.

Climatic conditions determine the outcome of a coating job: if surface temperature, relative humidity and dewpoint are wrong, paint and protective coatings fail to cure or adhere, and trapped moisture in a building leads to ongoing damage. The Protimeter HygroMaster 2 measures relative humidity and temperature and performs the psychrometric calculations needed to assess these conditions, so applicators and surveyors can decide when to proceed.

Humidity and temperature response is fast, and the sensor stick is replaceable. With the Hygrostick fitted, accuracy of the Protimeter HygroMaster 2 is +/-3% RH across 30% to 40% RH and +/-2% RH across 41% to 98% RH at 20°C. The plug-in surface temperature probe (BLD5805) covers 0°C to 70°C with +/-0.7°C accuracy at 25°C, while the 12:1 infra-red sensor reads -20°C to 80°C at +/-2°C. Results show on a colour LCD, and the Protimeter HygroMaster 2 stores up to 8,000 time-stamped readings or 6,100 with automatic logging.

Typical users include flood damage restoration technicians, building surveyors and commercial coatings inspectors working on concrete moisture and HVAC measurement. The Protimeter HygroMaster 2 is supplied by BAMR, South Africa's authorised Protimeter distributor.

Protimeter

Protimeter BLD7750 & BLD7751 HygroMaster 2

SKU · BLD7750 (+1 more)

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

  • 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
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Specifications

Specifications

Part Number
BLD7750 & BLD7751
Description
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.

Accessories

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

Accessories

POL8751Short Quikstick
POL4750Hygrostick
BLD5808Surface Temp Sensor
BLD7750-CKITFlooring Kit
BLD5802Humidity Ext Lead
BLD875530cm Humidity Probe
BLD7750-POUCarry Case
Downloads
Videos

Videos

Answers

Frequently asked questions

Which humidity sensors work with the HygroMaster 2?

It is compatible with the Hygrostick, giving 30% to 98% RH coverage, and the Quikstick or Quikstick ST, covering 0% to 100% RH. The Quikstick and Quikstick ST respond within 45 seconds when moving between 30% and 90% RH at 0 degrees C.

Can the HygroMaster 2 measure surface temperature as well as humidity?

Yes. It takes a plug-in surface temperature probe, ranging 0 to 70 degrees C at plus or minus 0.7 degrees C accuracy, and an infrared surface temperature sensor with a 12:1 distance to spot ratio, ranging minus 20 to 80 degrees C at plus or minus 2 degrees C accuracy.

How much data can the BLD7750/BLD7751 store before I need to download it?

It stores up to 8,000 date and time stamped results across all instrument functions, or 6,100 results when using automatic logging.

What warranty comes with the HygroMaster 2?

A 24 month warranty against mechanical or manufacturing defects. Wearing parts and accessories are not covered.

Is the HygroMaster 2 practical to carry between sites?

Yes. It weighs 227g and measures 178 mm by 81 mm by 38 mm, and a dedicated carry case (BLD7750-POU) is available as an accessory for site work.

What accessories are available for the HygroMaster 2, and what do they cost?

Accessories include the short Quikstick (POL8751), Hygrostick (POL4750), surface temperature sensor (BLD5808), flooring kit (BLD7750-CKIT), humidity extension lead (BLD5802), and a 30cm humidity probe (BLD8755). Contact BAMR for a quote on any of these.

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