Submersible Temperature Sensor | Ta993

4-20mA Output, Fully Submersible and Compact Ø25mm

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Ta993 submersible temperature sensor

At a Glance

  • Temperature Range Capability: -30 to +85°C
  • 25mm Diameter
  • Outputs: 4-20mA, 2-wire
  • Environmental Protection: IP68 to 50 metres
  • Accuracy: <±0.25%/Span Typical
  • Compact Only 25mm Diameter
  • Accurate Temperature Readings
  • Fully Submersible & Long-Term Immersion Protected to 100m 
  • Stainless Steel or Bronze Housing for Optimum Media Compatibility
  • Low Drift & Fast Response Time
  • Device Re-Scaling with ‘User Configuration Interface’


The Ta993 submersible temperature sensor comes with a standard temperature range of 0 to +85°C with other calibrated ranges available on request.  It has a compact 25mm diameter and is designed for long-term and permanent submersion in liquids.

Installation couldn’t be easier as the temperature sensor is designed to be suspended by its cable within the liquid that it is measuring.  Plus, thanks to its stainless steel or bronze housing options and various cable material, the Ta993 submersible temperature sensor has excellent media compatibility.

The Ta993 submersible temperature sensor has an integrated amplifier to produce an industry-standard 4-20mA output scale.  What’s more, fast response time is guaranteed by the solid epoxy potting on the body which secures the resistance thermometer in place making sure that the sensor picks up temperature change accurately and quickly.

Rescaling the temperature sensor is easy using the optional ‘User Configuration Interface’.  You simply connect the output wires to the device, interface to the PC/Laptop USB port and use the free software supplied with the unit.

Ideal applications include:

  • Water tank temperature measurement
  • Legionnaires prevention systems
  • Tsunami monitoring
  • Harbour seawater monitoring
  • Estuary temperature analysis
  • Environmental monitoring systems
  • Marine biology studies

Technical Specifications

Sensor Technology:PT100 Resistance Thermometer
Output:4 - 20mA / 2-wireanalogue
Supply:10 - 32Vdc
Calibrated Temperature Range Options:
0 to +85°C
0 to +50°C
-10 to +60°C
0 to +35°C
0 to +100*°C
32 to +185°F
0 to +122°F
14 to +140°F
32 to +95°F
Accuracy:<±0.25%/Span Typical
Pressure Rating:Tested to 5 bar for 48 hours, maximum submersion depth 50m
Media Temperature Limits:-30 to +85˚C
Media Wetted Parts:Housing: 316 Stainless Steel or CA104 Marine Bronze
PUR Cable: Raychem-25 Elastomer, PUR
TPE-U Cable: Polyolefin, Epoxy, Polyamide, FKM, TPE-U
FEP Cable: Polyolefin, Epoxy, Polyamide, FKM, FEP
Permissible Media:All fluids compatible with media wetted parts
Electrical Connection:Submersible Cable: PUR, TPE-U or FEP Jacket
Cable Length:Standard lengths: 2, 5, 10, 15, 20, 50m
Optional: any cable length required in 1m increments
Cable length does not affect the performance of the sensor but is limited to 1000m
Environmental Protection:IP68 to 50m / 5bar
*Note: Calibrated range only - maximum media temperature is 85°C.

Product Dimensions

Ta993 submersible temperature sensor outline drawing

Wiring Details

Red+ve supply
Blue-ve supply & 4-20mA output in series
Whiteto case
Greencable screen

Ordering Codes & Options

Ta993-A-A-SP-01-000 (example code)Ta993-A-A-SP-01-000
Product Family
Electrical Output
A = 4-20mA, 2-wire-A
Temperature Range
A = 0 to +85°C (standard)-A
B = 0 to +50°C-B
C = -10 to +60°C-C
D = 0 to +35°C-D
E = 32 to +185°F-E
F = 0 to +122°F-F
G = 14 to +140°F-G
H = 32 to +95°F-H
I = 0 to +100°C (Note: Max media temperature is +85°C)-I
J = -30 to +50ºC-J
K = -30 to +75ºC-K
- = Other ranges available on request--
Housing Material
S = 316 Stainless Steel-S
M = Marine Bronze CA104-M
Cable Type
Cable Length (in metres)
01 = 1 metre-01
10 = 10 metres-10
Specials Code
000 = No Special Requirements-000