HT6

HT6 the most rugged multiprobe in the world



HT6 sensor closeup. Viewed with Temperature, pH, Dissolved oxygen, conductivity, salinity, TDS and circulatorHT6 sensor storage cup and sensor guard are fully integrated

We manufacture the most rugged multiprobe in the world, the HT6, which is designed to handle extremely harsh environments. The HT6 is so rugged that it was selected to be used in the DepthX project on board an autonomous submarine built by StoneAerospace in collaboration with NASA and the Univerity of Texas to explore the moon Europa.  

HT6 Bulkhead connector with recessed pins with no possibility for cross threading


The HT6 is highly recommended for the following applications:

HT6 Bulkhead connector with recessed pins with no possibility for cross threading
  • Long-Term monitoring in high salinity water, marine environment, or desalinization plant
  • Monitoring bodies of water deeper than 200 m
  • Extra long deployment cable up to 4000 feet  ( 1219.00 m ) ( Add-on option )  
  • Intensive use for ground water monitoring in 2" well or larger
  • Deployment from or near a bridge or any structure with electromagnetic interference (EMI). The HT6 has absolute signal shielding from the sensor guard to the DB9 connection at the end of the cable. 
  • High velocity discharge areas
  • Deployment in any harsh environment
  • Deployment in high traffic areas
  • Presence of alligators 


Features:

ht6-3-3
  • Fully encased in Titanium for maximum ruggedness and durability
  • Integrated titanium sensor guard, storage cup, calibration cup, and flow cell 
  • Bulkhead connector with recessed pins with no possibility for cross threading 
  • Underwater cable with 90% copper braided shield
  • Hach® LDO(tm) Luminescent Dissolved Oxygen sensor
  • Memory for unattended logging
  • RS-232, RS-485 and SDI-12 communications
  • TTY mode communications for ease of integration
  • Hydrolab MS5 circuit board from Hach® Environmental
  • Four built-in expansion ports configured to fit your specific needs
  • Measures several parameters simultaneously
  • Compact, lightweight, and extremely rugged 1.9" diameter housing
  • Used for attended or unattended monitoring
  • Optional internal battery pack


Specs:

  • Outer diameter: 1.90"/4.826 cm
  • Length: 24.5”/62.2 cm
  • Length (with battery pack): 28.00"/71.00 cm
  • Weight: 3.5lbs/1.56 kg (No additional weight required for deployment)
  • with battery pack: 4.5 lbs/2.00 kg (No additional weight required for deployment)
  • Computer Interface: RS-232, SDI-12, RS-485
  • Memory: 120,000 measurements
  • Battery Supply: 8 AA batteries
  • Operating Temperature: -5 to 50° C
  • Maximum Depth: Can be customized to 1000m operational depth

 

Customization: The HT6 can be customized to fit various application needs.


The HT6 on board the autonomous submarine built by StoneAerospace to explore the moon Europa.

The HT6 on board the autonomous submarine built by StoneAerospace to explore the moon Europa.

The HT6 on board the autonomous submarine built by StoneAerospace to explore the moon Europa.

Sensors:

The LDO sensor by Hach uses luminescent dissolved oxygen technology,

which has no membranes to maintain.

  • Range: 0 to 20 mg/L
  • Accuracy: +/- 0.1 up to 8 mg/L ; +/- 0.2 above 8 mg/L
  • Resolution: 0.01 mg/L


The temperature sensor is a 30k ohm variable resistance thermistor.

The temperature sensor is included with every Hydrolab sonde.

  • Range: -5 to 50 °C
  • Accuracy: +/- 0.10 °C
  • Resolution: 0.01 °C


The Conductivity sensor uses four graphite electrodes in an open cell design.

  • Range: 0-100 mS/cm
  • Accuracy: ± (0.5% of reading + 0.001 mS/cm)
  • Resolution: 0.001


The pH sensor uses glass bulb and refillable reference electrode.

The ORP sensor uses a simple platinum band that donates or accepts electrons to monitor chemical reactions, quantify ion activity, or determine the oxidizing or reducing properties of a solution.


pH

  • Range: 0 to 14 pH units
  • Accuracy: +/- 0.2 units
  • Resolution: 0.01 units


ORP

  • Range: -999 to 999 mV
  • Accuracy: +/- 20 mV
  • Resolution: 1 mV


Custom-made pressure sensors with four range options.

  • Range: 0 to 10m (Vented Level), 0 to 25m, 0 to 100m, 0 to 200m
  • Accuracy: +/- 0.003 meters, +/- 0.05 meters, +/- 0.1 meters
  • Resolution: 0.001 meters, 0.01 meters, 0.1 meters


The McVan® Self-Cleaning Turbidity sensor measures from 0 to 3000 NTU and includes a user-programmable cleaning system to remove any fouling or debris that could otherwise affect readings.

  • Range: 0-3000 NTU
  • Accuracy (compared to Stable-Cal): 1% up to 100 NTU, 3% from 100-400 NTU, 5% from 400-3000 NTU
  • Resolution: 0.1 NTU from 0-400 NTU; 1 NTU for >400 NTU
  • Temperature Coefficient: 0.05%/C


The Total Dissolved Gas (TDG) sensor uses a pressure transducer mounted behind a rigid gas-permeable silicone membrane to measure the amount of total gaseous compounds dissolved in a liquid. ( Max depth deployment is 60 m for TDG sensor ) 

  • Range: 400 – 1300 mmHg
  • Accuracy: +/- 0.1% of span
  • Resolution: 1.0 mmHg


The Ion Selective Electrodes (ISEs) are available for measuring Ammonia, Nitrate, or Chloride.

Ammonia

  • Range: 0 to 100 mg/L-N
  • Accuracy: Greater of +/- 5% of reading, Or +/- 2 mg/L-N
  • Resolution: 0.01 mg/L-N
  • Max Depth: 15 meters

Nitrate

  • Range: 0 to 100 mg/L-N
  • Accuracy: Greater of +/- 5% of reading, Or +/- 2 mg/L-N
  • Resolution: 0.01 mg/L-N
  • Max Depth: 15 meters

Chloride

  • Range: 0.5 to 18,000 mg/L
  • Accuracy: Greater of +/- 5% of reading, Or +/- 2 mg/L-N
  • Resolution: 4 digits
  • Max Depth: 15 meters


Most common questions and answers:

Q: Does the HT6 use the same communication protocol as the Minisonde®? 

A: Yes. The HydroTech HT6 uses the same firmware as the Minisonde® 5 with all its features.


Q: Can I use the Hydras 3 LT to communicate with the HydroTech HT6 ? 

A: Yes.


Q: Can I use the Hydras 3L Pocket software with the HydroTech HT6? 

A: Yes. 


Q: Can I use my existing Hydrolab® cables to connect to the HydroTech HT6? 

A:  No. HydroTech HT6 uses a different underwater connection.  


Q: Does the HydroTech HT6 have internal memory? 

A: Yes, it has enough internal memory for 120,000 measurements.


Q: Does the HydroTech HT6 support the LDO sensor? 

A: Yes. You also have the option of adding the standard Clark Cell.


Q: Can the HydroTech HT6 be fitted with an internal battery pack? 

A: Yes. The HydroTech HT6 can be fitted with an optional battery pack with 8AA batteries.  The battery option will increase the length of the unit from 24.5”/62.2 cm” to 28.0"/71.00 cm.


Q: Does the HydroTech HT6 require internal batteries when used with the SVR4A®? 

A:  Yes. It is recommended to have an internal battery option on the HydroTech HT6 when used with the SVR4® display.


Q: Does the HydroTech HT6 require internal batteries when used with the Archer PDA? 

A:  Yes. It is recommended to have an internal battery option on the HydroTech HT6 when used with the Archer PDA.


Q: Does the HydroTech HT6 require internal batteries when used with the computer ?

A:  Yes. When used with a computer, the HydroTech HT6 will require external power or an internal battery pack.


Q: When connected to a Datalogger, can the HydroTech HT6 still log data internally ? 

A: Yes. The HydroTech HT6 can perform all the following tasks simultaneously: 

    • Communicate with a PC or Handheld unit via RS232 or RS422
    • Communicate to a datalogger via SDI-12 or RS232 
    • Log data to its internal memory up to 4 files at a time, even with overlapping dates


Q: What sensors configuration can I have on the HydroTech HT6? 

A: The HydroTech HT6 unit comes standard with the temperature sensor, then you can add any combination of the following sensors:

    • pH
    • Conductivity / Salinity
    • LDO Optical Disolved Oxygen, or Clark Cell
    • ORP (Redox)
    • Depth (25m, 100m or 200m) 
    • Total dissolved gas “TDG” mmHg
    • Self-Cleaning Turbidity 
    • Ion Selective Electrodes Ammonia, Nitrate or Chloride
    • (Optional circulator for low flow measurement to be used with the optional Clark Cell DO sensor)


HT6 Addendum

For a quote please email your request to sales or call 512-846-2893

       © Hydrotech ZS Consulting 2016