conductivity specifications

conductivity specifications

Click the following links to jump to your specifications of interest:

STs4xxx -- for submersion applications, 4-20 ma output
STs4xxxT -- for submersion applications with additional temperature output (4-20 ma)
STs4xxxB -- for submersion applications, 0.40 to 2.50 vdc output, battery powered
How to specify range
How to specify custom range
download STs4xxx conductivity brochure (130kb)?


series STs4xxx, 2-wire, 4-20 ma conductivity sensor/transmitters
output	4 to 20 ma
power supply voltage	7 to 40 vdc
loop impedance (max)	250 ohms at 12 vdc, 1650 ohms at 40 vdc
cable from transmitter to power supply	2 conductor, twisted pair, 3 mile maximum
isolation	600 VDC, >70 db at 50/60 Hz
See additional specifications below that apply to all versions -- click here
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series STs4xxxB, voltage output conductivity sensor/transmitters replaceable battery, or for external supply provided by user
output	0.40 to 2.50 volts (or specify desired output)
power supply voltage	self contained, replaceable lithium battery, or external 4 to 16 volts DC supply
output impedance (max)	1 Megohm (prevents premature failure of battery if leads are shorted)
cable from transmitter to power supply	4 conductor, twisted pair, 1000 feet max
isolation	none
See additional specifications below that apply to all versions -- click here
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series STs4xxxT, 2-Wire, 4-20 ma conductivity sensor/transmitters with optional, additional 2-wire, 4-20 ma temperature output
output	4 to 20 ma
range	0-50 degrees Celsius
power supply voltage	7 to 40 vdc
loop impedance (max)	250 ohms at 12 vdc, 1650 ohms at 40 vdc
cable from transmitter to power supply	4 conductor, twisted pair, 3 mile maximum
isolation	600 vdc, >70 db at 50/60 Hz
See additional specifications below that apply to all versions -- click here
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The following data pertains to all configurations:
linearity	� 1.0% of full scale
accuracy	� 1.0% of full scale
sensitivity	� 0.05% of full scale
stability	� 0.1% of full scale
repeatability	� 0.1% of full scale
response time (including electrodes)	90% < 5 seconds
temperature compensation	2% per degree Celsius
input range	0-100, 200, 500, 1000, 2000, 5000, 10000 uSiemens see below
conductivity sensing range	0-100, 200, 500, 1000, 2000, 5000, 10000 uSiemens see below
pressure	0-100 psi
humidity	0-100%
wetted materials	316 SS, Kynar, Teflon, Viton optional titanium housing
length	343 mm (13.5 in.)
diameter	19 mm (0.750 in.) maximum
standard cable length, model STs	10 meters (approx 33 feet)
weight (excluding cable)	< 0.22 kg (0.5 lb.)
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How to specifiy range: Replace the xxx model number with the corresponding range desired:
range	model number
0-100 uS	STs4102 or STs4102T (1.0 x 10²)
0-200 uS	STs4202 or STs4202T (2.0 x 10²)
0-500 uS	STs4502 or STs4502T (5.0 x 10²)
0-1000 uS	STs4103 or STs4103T (1.0 x 10³)
0-2000 uS	STs4203 or STs4203T (2.0 x 10³)
0-5000 uS	STs4503 or STs4503T (5.0 x 10³)
0-10000 uS	STs4104 or STs4104T (1.0 x 10⁴)
0-specify uS	STs4xxx or STs4xxxT Replace xxx with appropriate numbers -- see examples below
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To determine your custom range, observe the following examples or contact pHionics at the numbers listed below:
desired range	decimal notation	appropriate model number
0-250	2.5 x 10²	STs4252 or STs4252T
0-2500	2.5 x 10³	STs4253 or STs4253T
0-300	3.0 x 10²	STs4302 or STs4302T
0-3000	3.0 x 10³	STs4303 or STs4303T
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