HydroTech - Model Compact DS (CDS) -Perfect Multiprobes for Spot Checking

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

Optical Dissolved Oxygen sensor. Hach LDO sensor: 

• 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 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 a 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 two range options.

• Range: 0 to 25m or 0 to 100m
• Accuracy: +/- 0.05 meters
• Resolution: 0.01 meters

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. Maximum water depth is 25 m.

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

The 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