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Conductivity Measurement

Our broad range of conductivity cells encompasses three measuring techniques: 2-electrode cells for µS/cm ranges, 4 and 6 electrode sensors for mS/cm levels and non-contact, electrode-less sensors.
Multi-electrode and electrode-less (toroidal) sensors tend to be used for applications with aggressive chemicals or where there can be sensor coating or fouling.
Comprehensive mounting methods are available to suit the majority of process applications: insertion, flow-through, immersion and retractable.

2-Electrode Contacting Cells - Range 0 ... 10,000 µS/cm

High accuracy technique for trace conductivities from ultrapure water to industrial rinse waters. An alternating current is passed between two electrodes in contact with a solution. The transmitter converts the resultant potential difference into conductivity, concentration or specific resistance.

Table 1 of 3

	AC211	AC212	AC213	AC221
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Electrode Material	Carbon	Carbon	Carbon	Stainless steel
Cell Constant	0.1 or 1.0	0.1 or 1.0	0.1 or 1.0	0.01 or 0.1
Temperature	100 °C (212 °F)	100 °C (212 °F)	90 °C (194 °F)*	200 °C (392 °F)**
Pressure	6.6 bar (100 psi)	6.6 bar (100 psi)	--	20 bar (290 psi)
Submersion	--	--	10 m (AC213/0)	--
Immersion	--	--	1 or 2 m (AC213/1 & AC213/2)	--
Flow-through	--	1/2 in. BSP or NPT	--	3/8 in. BSP or NPT
Screw-in Insertion	1 in. BSP or NPT	--	--	3/4 in. BSP or NPT
Retractable	--	--	--	--
Tri-Clamp Insertion	--	--	--	--
			* AC213/1 & /2 only	** When used with high temperature cable

Table 2 of 3

	2278	2085	TB25	TB254
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Electrode Material	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Cell Constant	0.05	0.05 or 0.1	0.01, 0.1 or 1.0	0.01, 0.1 or 1.0
Temperature	130 °C (266 °F)	110 °C (230 °F)	175 °C (347 °F)	100 °C (212 °F)
Pressure	10.5 bar (150 psi)	10.5 bar (150 psi)	8.6 bar (125 psi)	6.9 bar (100 psi)
Immersion	-	-	-	3/4 in. NPT
Flow-through	-	-	-	-
Screw-in Insertion	-	-	-	1 in. NPT
Retractable	-	1-1/2 in. BSP or NPT	-	-
Tri-Clamp Insertion	2 in.	-	1-1/2 in., 2 in., 2-1/2 in., 3 in.	-

Table 3 of 3

	TB26	TB264	TB27
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Electrode Material	Stainless steel	Stainless steel	Stainless steel
Cell Constant	0.01, 0.1 or 1.0	0.01, 0.1 or 1.0	0.01, 0.1 or 1.0
Temperature	200 °C (392 °F)	200 °C (392 °F)	200 °C (392 °F)
Pressure	6.9 bar (100 psi)	13.8 bar (200 psi)	20.7 bar (300 psi)
Immersion	1/2 in. NPT	-	-
Flow-through	-	1/2 in. NPT	-
Screw-in Insertion	3/4 in. NPT	-	-
Retractable	1-1/2 in. NPT	-	1-1/2 in. NPT
Tri-Clamp Insertion	-	-	-

4-Electrode Contacting Cells - Range 0 ... 2,000 mS/cm
Auto-compensating technology for high level conductivity and concentration measurements in high-coating processes. Provides an alarm when cleaning is required.

Table 1 of 2

	TB451	TB454	TB457	TB461
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Electrode Material	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Temperature	140 °C (284 °F)	100 °C (212 °F)	175 °C (347 °F)	200 °C (392 °F)
Pressure	6.9 bar (100 psi)	6.9 bar (100 psi)	8.6 bar (125 psi)	15.5 bar (225 psi)
Immersion	-	3/4 in. NPT	-	1/2 in. NPT
Flow-through	-	-	-	-
Screw-in Insertion	-	1 in. NPT	-	3/4 in. NPT
Retractable	-	-		1-1/4 in. NPT
Tri-Clamp Insertion	1 in. and 1-1/2 in.	-	1-1/2 in., 2 in., 2-1/2 in., 3 in.	-

Table 2 of 2

	TB464	TB468	TB47
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Electrode Material	Stainless steel	Hastelloy C	Stainless steel
Temperature	200 °C (392 °F)	Up to 140 °C (284 °F)	200 °C (392 °F)
Pressure	13.8 bar (200 psi)	Up to 6.9 bar (100 psi)	20.7 bar (300 psi)
Immersion	-	-	-
Flow-through	1/2 in. NPT	-	-
Screw-in Insertion	-	3/4 in. NPT	-
Retractable	-	1 in. NPT	1-1/4 in. NPT
Tri-Clamp Insertion	-	-	-

Electrodeless Sensors - Range 0 ... 2,000 mS/cm

Non-contact technique providing immunity to polarisation, oily fouling and non-conducting coatings until gross fouling occurs. Measurement of the magnitude of induced AC into a closed loop of solution using two embedded toroids.

	TB4042	TB4043
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Body Material	PEEK	PEEK
Temperature	200 °C (392 °F)	121°C (250 °F)
Pressure	6.6 bar (100 psi)	6.6 bar (100 psi)
Immersion	3/4 in. NPT	-
Flow-through	-	-
Screw-in Insertion	1-1/2 in. NPT	-
Rectractable	1-1/2 in. NPT	-
Tri-Clamp Insertion	-	2 in.