Hydrotech ZS Consulting

Water quality monitoring equipment, Hydrotech, Hydrolab, YSI, In-situ, Eureka, EXO, Sondes, Multiprobes, Sensors, Monitoring equipment, Hydrolab repair, YSI repair, Nitrate, Nitrite, pH, Dissolved Oxygen, Turbidity, Conductivity, Salinity


For complete water quality sonde set-up and real time monitoring, the Surveyor is a simple and rugged handheld display that is designed specifically for use with the Hydrotech Compact MS, HT6, OEM MS5, OEM DS5, Hydrolab® standard DS5X, DS5, and MS5.


Rugged and dependable NEMA 6 case with handstrap

Displays data in real-time or can store up to 375,000 measurements

Oversize screen with backlight allows data to be viewed in any conditions

Available with optional GPS and Barometric Pressure capabilities

Available in English, French, or Spanish


Designed specifically for use in severe field conditions, the Surveyor can take a beating on land or in the water and still deliver your data

Allows the user huge flexibility – the Surveyor can be used for real time data collection or graphing and it can be used for setting up and downloading log files

Complete set-up capability allows users to leave their laptops in their offices

GPS option automatically integrates latitude and longitude coordinates with water quality data

Barometric Pressure option makes Dissolved Oxygen calibration simple, and can be logged with water quality data


Memory: 375,000 measurements

Battery Supply: Rechargeable Nickel Metal Hydride

Typical Battery Life: 12-16 hours

Size: 11"x 4" x 5"; 27.9 cm x 10.2 cm x 3.8 cm

Weight: 2 lbs; 0.9 kg

Most common questions and answers:

Q: Can the rechargeable battery in my Surveyor 4a power my DataSonde or MiniSonde?

A: The Surveyor 4a rechargeable battery can power HydroTech and Hydrolab multiprobes. The battery life is 12-16 hours, but it can vary depending on the sonde configuration and measurement frequency. Please note that a Surveyor will not power a DataSonde if the sonde is configured with both Self-Cleaning Turbidity AND a Fluorometer (i.e., Chlorophyll, Rhodamine, or Blue-Green Algae).

Q: Is the handheld waterproof?

A: Yes, the Surveyor 4a has a NEMA 6 rating, which means that the enclosure is protected against the entry of water during occasional temporary (30 minutes) submersion at a limited depth (one meter). 

Q: What type of batteries are required?

A: The Surveyor 4a uses a DR-30, 7.2V, 3.5Ah, NiMH Rechargeable Battery made by GP Batteries. The internal clock battery is a standard 3V lithium coin cell battery. 

Q: Why does my Surveyor shut down when it is not in use?

A: The Surveyor 4a will automatically power off if it has not been used for several minutes. The user can set and change this feature. 

Q: How long does it take to recharge the Surveyor battery?

A: If the Surveyor 4a battery is completely discharged, the charger can restore full power in approximately four hours. 

P.O. Box 5520

Round Rock, TX 78683  

1700 Bryant Dr. suite 103

Round Rock, TX 78664


Telephone: 512-846-2893

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