Base•X₂ CTD


This compact CTD profiler with integrated WiFi is known for convenience and efficiency.

Presenting the best profiler technology of today in a compact form, Base•X₂ retains the size of its popular predecessor, Base•X, while gaining embedded WiFi connectivity and GPS. With the swap of a single sensor head, Base•X₂ converts from a CTD to an SVP.

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Product Description

The latest generation of Base•X presents the best profiler technology of today in a compact form. Available in 100 m and 500 m versions, Base•X₂ retains the size of its predecessor while gaining embedded WiFi connectivity and GPS . Data is automatically downloaded and processed into desired manufacturer formats, saving valuable time for the operator.

Designed for profiling in coastal waters, this two sensor-port profiler is optimal for hand deployments from small boats, launches, and survey vessels. Like all other X•Series instruments, Base•X₂ uses Xchange™ field-swappable sensors and converts from a CTD to an SVP with the switch of a single sensor head.

Product Info


Sensor Ports 2
Depth Rating 100 m, 500 m
Housing Material 100 m: Acetal, 500 m: Acetal
Sensor Cage Material Stainless Steel
Shackle Included
Communications WiFi, RS-232
Baud Rate 38400, 115200
GPS Integrated
Power Source Internally Rechargeable Battery, External
Data Output Logs to Memory, Real-time Output
Input Voltage 9-28 V
Length 390 mm (15.3″)
Diameter 69 mm (2.7″)
Weight in Air 1.2 kg (2.6 lbs)
Weight in Water 0.5 kg (1.1 lbs)
Product Info



Parameter Conductivity, Temperature Pressure
Depth Rating 6000 m 50 m, 100 m, 200 m, 500 m, 1000 m, 2000 m, 4000 m, 5000 m, 6000 m
Range C: 0-90 mS/cm ᵇ, T: -5-45 ⁰C ᶜ 0-50 dBar, 0-100 dBar, 0-200 dBar, 0-500 dBar, 0-1000 dBar, 0-2000 dBar, 0-4000 dBar, 0-5000 dBar, 0-6000 dBar
Response Time C: 25 ms ʰ, T: 100 ms 10 ms
Accuracy (+/-) C: 0.01 mS/cm, T: 0.005 ⁰C 0.05% FS
Precision (+/-) C: 0.003 mS/cm, T: 0.003 ⁰C 0.03% FS
Stability C: 0.003 mS/cm/month ͤ -
Length 109 mm (4.25″) 73 mm (2.86″)
Diameter 63 mm (2.47″) 11 mm (0.45″)
Resolution C: 0.001 mS/cm, T: 0.001 ⁰C 0.02% FS
a Standard range
ᵇ Will over-range to 100 mS/cm. Inquire for specifications.
ᶜ Will over-range to 60 ⁰C. Inquire for specifications.
ᵈ Digital auto-ranging
ᵉ When deployed with UV•Xchange™
ᶠ For standard range only. 0.02 m/s for other ranges.
ᵍ For standard range only. 0.5-1.0 m/s for other ranges.
ʰ At 1 m/s flow
Instrument Manual

Sensor Manuals

Software Manual

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