Model ST857 DynaProbe pH and ORP Sensors for the Process Industries

Model ST857 DynaProbe pH and ORP Sensors for the Process Industries

Specifications
Ordering Information

Description
The ST857 is a rugged, sealed, replacement sensor designed for insertion / retraction applications. The Patented solid state reference cell features the unique IonTrap™ design for extended service life in the most severe applications. The body, with an integral bulb guard and anti-blowout restraint, is molded from chemically resistant Kynar(PVDF) and the reference junction is porous Teflon. Built-in temperature compensators are available. Sensor also available in ORP (Redox) version. Also fits TBI / Bailey Model TB557 "Hot Tap" sensor assemblies.

SPECIFICATIONS
pH Range	0-14 pH
ORP Range	± 5000 mV
Temp Range	0 -120º C
Max Pressure/Temp	100 psig at 90º C
Reference	Ag-AgCl
Wetted Materials	Kynar, Teflon, Glass, Viton O-Rings
Standard cable length	7 Feet

Housing Model SA857 must be ordered separately

Before you call to place your order, please print out this page and fill in this PART# BOX by selecting from options below. Boxes 1-9 must be filled in.
Part #	1	2	3	4	-	5	6	7	8	9
ST857-	-	-	-	-	-	-	-	-	-

OPTIONS

—

Check options 1-9 below to complete PART# BOX above.

1 — Liquid Junction

[W] Recessed Coaxial Wood

[R] Recessed Coaxial Teflon

2-3 — Measurement Electrode

[33] pH, HT-3 Rugged Dome Bulb

[43] pH, HT-4 High pH bulb (for pH 13 and above)

[PB] ORP, Platinum Band

4 — Temperature Compensator: (for direct input into following manufacturer's preamp/instrument)

[0] T.C. not required

[1] 3K Ohms for most older Models of TBI/Bailey, Uniloc, and other US manufacturers

[9] 301 Ohms for older Great Lakes Models: 60, 70, 90, 570, and 690

[D] Pt 100 Ohms for Beckman Model SoluComp, TBI/Bailey (ABB) TB82 & TB84, Uniloc 1054, Foxboro 870 & 874, Yokogawa, and most European Models

[H] Pt 1OOO Ohms for Yokogawa, Conducta, Polymetron, LTH, & many European models

5 — Cable Type:

[A] Low Noise Coax ( < 80º C service ) - for more than 7 ft.

[E] Jacketed Coax w/ TC leads ( < 80º C service ) - for more than 7 ft.

[T] Teflon Coax ( > 80º service ) for more than 7 ft.

[U] Jacketed Teflon Coax w/TC leads ( > 80º service ) for more than 7 ft.

6-7 — Cable Length:

[07] 7 ft. = Standard length

[XX] Specify Cable length (in feet) above 7 ft. standard length

8-9 — Required Sensor Connectors:

[FB] BNC for pH and ferrules on all other leads (for use with Terminal Block or Terminal Strip)

[BC] BNC for pH and ORP only (no T.C.)

[FF] All Ferrule connectors ( for use with Terminal block or Terminal Strip)