
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 BLD7750 & BLD7751 HygroMaster 2
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

Also available to buy online at GaugeIt, our online store.
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
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
| 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 |
Downloads
Videos
Videos
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.
Quote on the Protimeter BLD7750 & BLD7751 HygroMaster 2 by close of business.
Tell us about your application and we will send a quote with lead time and accessories.
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Tell us about your application and we will send a quote with lead time and accessories.
