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HYDROLAB is a leading US manufacturer that introduced the first Multi-Parameter Sonde to the world in 1968. For more than 45 years, Hydrolab has designed and manufactured multi-parameter sondes for water quality monitoring in the environment. Hydrolab is now part of the Hach Hydromet and OTT Hydromet family.

At the heart of Hydrolab multi-probes is our superior sensor technology, which ensures that the important data you collect is solid, reliable, and dependable. In addition, our sensors are built to last, and comes packaged in a rugged, non-corrosivehousing so your total cost of ownership is ultimately the lowest in the industry.




Surveyor® 4a Data Display

S4A


Surveyor® 4a Data Display



Details

The Series 4a water quality instruments are designed to be used in fresh, salt or polluted water. The instruments measure multiple parameters simultaneously including: temperature, pH, ORP, conductivity, dissolved oxygen, depth, turbidity, total dissolved gas, ammonia, nitrate, chloride, ambient light, transmissivity, and chlorophyll a.

Specifications


ParameterRange      
AccuracyResolutionInstrument
Temperature -5 - 50° C±0.10° C0.01° CD5,D5X,M
Salinity  

0 to 70 ppt±0.2 ppt0.01 pptD5,D5X,M
Specific Conductance   0 to 100 mS/cm

±1% of reading; ±0.001 mS/cm

4 digitsD5,D5X,M
4-Beam Turbidity 

0 to 1000 NTU

±5% of reading; ±1 NTU

1 NTU (100 NTU)

0.1 NTU (<100 ntu="" td="">D5
Self-Cleaning Turbidity    
 

0 to 3000 NTU

±1%, up to 100 NTU

±3%, 100-400 NTU

±5%, 400-3000 NTU

0.1, up to 400 NTU

1.0, 400-3000 NTU

D5,D5X,M
pH

0 to 14±0.2 units0.01 unitsD5,D5X,M
ORP -999 to 999 mV±20 mV1 mVD5,D5X,M

Depth

Vented Level   

0 - 10 m

0 - 25 m

0 - 100 m

0 - 200 m

±0.003 m

±0.05 m

 ±0.05 m

±0.1 m

0.001 m

  0.01 m

 0.01 m

0.1 m

D5,D5X,M

Ammonium/Ammonia   0 to 100 mg/L-NGreater of ±5% of reading 
or ±2 mg/L-N (typical)
0.01 mg/L-ND5,D5X,M
Nitrate  

0 to 100 mg/L-NGreater of ±5% of reading or ±2 mg/L-N (typical)0.01 mg/L-ND5,D5X,M
Chloride 0.5 to 18,000 mg/LGreater of ±5% of reading 
or ±2 mg/L (typical)
4 digitsD5,D5X,M
Total Dissolved Gas  400 to 1300 mmHg±0.1% of span1.0 mmHgD5,D5X,M
Ambient Light0 to 10,000 μmol s-1m-2±5% of reading or ±1 μmol s-1m-21 μmol s-1m-2D5,D5X
Chlorophyll a

0 to 500 μg/L

0 to 50 μg/L
0 to 5 μg/L

 0.01 μg/LD5,D5X,M
Rhodamine WT

0 to 1000 ppb

0 to 100 ppb
0 to 10 ppb

 0.01 ppbD5,D5X,M
Barometric Pressure  500 to 850 mmHg±10 mmHg0.1 mmHgS
Global Positioning   
System 

-90 to 90° Latitude

-180 to 180° Longitude

25 m CEP (50%) without SA and DGPS
2 m CEP (50%) with DGPS
0.1”S

Parameters

 
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