pH / ORP Measurement

Our broad range of sensing systems apply sensor technologies directed at specific application challenges.

Flowing junction technology is used specifically for pure waters, whereas solid-polymer and solid-matrix sensors are used in aggressive process streams. High temperature measuring electrodes are available for applications up to 140 °C, while flat glass promotes self-cleaning efficiency in highly fouling media.

Comprehensive mounting methods are available to suit the majority of process applications: insertion, flow-through, immersion, submersion and retractable. For additional information refer to our pH Sensors brochure.

12 mm Combination Electrodes

Sensing Systems

12 mm Combination Electrodes

	AP121
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Sensor Type	pH / Redox
Shaft Length	120 mm (4.7 in.)
Junction	PTFE
Glass Type	Bulb
Maximum Temperature	130 °C (266 °F)
Temperature Sensor	Pt100

Sensing Systems (1 of 4)

	2867	7600
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Body Type	Immersion	Immersion Flow-through
Temperature Sensor	--	Pt100
Junction	Ceramic	PTFE
Reference Type	Flowing Junction	Flowing Junction
Body Material	ABS	PP
Process Connection	Dip Flange	1/2, 1 and 3/8 in. Thread Dip Clamp
Maximum Temperature	70 °C (158 °F)	100 °C (212 °F)
Maximum Pressure	--	6 bar (87 psi)

Sensing Systems (2 of 4)

	AP100	AP200	AP300
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Body Type	Immersion Flow-through Screw-in Insertion Bayonet Insertion	Immersion Flow-through Screw-in Insertion	Immersion Bayonet Insertion Screw-in Insertion Hot-tap Retractable
Temperature Sensor	Pt100	Pt100	Pt100 / B3k
Glass Type	Bulb	Bulb	Bulb / Flat*
Junction	PTFE	PTFE	PTFE
Reference Type	Slurry	Solid Polymer	Gel
Body Material	PP	PP, PPS and 316 SST	PPS, PVDF and 316 SST
Process Connection	Bayonet 1/2, 3/8 or 1 in. Dip tube	1 or 1-1/4 in. Thread DN 25 Socket Dip Flange	3/4 or 1 in. Thread Via ball valve 1-1/4 in.
Maximum Temperature	100 °C (212 °F)	130 °C (266 °F)	105 °C (221 °F)
Maximum Pressure	6.9 bar (100 psi)	6 bar (87 psi)	6 bar (87 psi)
			* Self-cleaning

Sensing Systems (3 of 4)

	TB(X)551	TB(X)556	TB(X)557
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Body Type	Immersion Quick Insertion	Immersion Screw-in Insertion	Standard Pressure Retractable
Junction	PTFE or Wood	PTFE or Wood	PTFE or Wood
Glass Type	Bulb / Flat	Bulb / Flat	Bulb / Flat
Reference Type	Encapsulated Salt Matrix	Encapsulated Salt Matrix	Encapsulated Salt Matrix
Body Material	PPS	PVDF	PVDF 316 SST Titanium
Process Connection	1 in. NPT	3/4 in. NPT	Via ball valve (1-1/4 or 1-1/2 in. NPT)
Maximum Temperature	140 °C (284 °F)	140 °C (284 °F)	140 °C (284 °F)
Maximum Pressure	6.9 bar (100 psi)	6.9 bar (100 psi)	6.9 bar (100 psi)

Sensing Systems (4 of 4)

	TB(X)561	TB(X)564	TB(X)567	TBX587
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Body Type	Insertion Retractable with TB18	High Pressure Retractable	Screw-in Insertion	Hot Tap, Ball Valve Insertion
Junction	PTFE or Wood	PTFE or Wood	PTFE or Wood	PTFE or Wood
Glass Type	Bulb / Flat	Bulb / Flat	Bulb / Flat	Bulb / Flat
Reference Type	Encapsulated Salt Matrix	Encapsulated Salt Matrix	Encapsulated Salt Matrix	Encapsulated Salt Matrix
Body Material	PVDF	PVDF, 316 SST	PVDF, 316 SST	PVDF
Process Connection	25 mm	Via ball valve (1-1/4 in. NPT)	1 in. NPT	1 in. NPT
Maximum Temperature	140 °C (284 °F)	140 °C (284 °F)	140 °C (284 °F)	140 °C (284 °F)
Maximum Pressure	6.9 bar (100 psi)	20.7 bar (300 psi)	17.2 bar (250 psi)	10.3 bar (150 psi)