91S Transducer 91 - 1-
Transducer type ➂
(Material and unit of length)
B = 316 SS in inches
D = 316 SS in centimeters
E = Monel or HC in inches
F = Monel or HC in centimeters
Process connection
1 =
3
⁄4" NPT
2 = 1" NPT
B = 1" 150 lb. flange
C = 1
1
⁄2" 150 lb. flange
D = 2" 150 lb. flange
E = 1" 300 lb. flange
F = 1
1
⁄2" 300 lb. flange
G = 2" 300 lb. flange
H = 1" 600 lb. flange
J = 2" 600 lb. flange
Transducer material
22 = 316/316L stainless steel
HC = Hastelloy C
MM = Monel
Transducer length
Specify length in inches (from 1" to 130") or centimeters
(from 3 to 330 cm). Consult factory for lengths over
130". Minimum length is 2" (5 cm) for flange process
connections.
Echotel
®
Trident 91S/92S
Ultrasonic Level Switches
Model 91S Model 92S
Instruction Manual and Parts List
91S PART NUMBER CONSTRUCTION
Electronics
9 1 S - - 1
Output Signal
A1A = 10 amp DPDT relay ➀
L1H = Opto-isolated output ➀
T1W= Two-wire, 8 or 16 mA current shift ➁
(must use Input code 2)
Input
0 = 120 VAC
1 = 240 VAC
2 = 24 VDC
3 = 12 VDC
5 = 48 VDC
Housing
F = NEMA 4X/7/9, aluminum sand cast,
3
⁄4" NPT,
dual conduit
E = NEMA 4X/7/9, aluminum sand cast,
3
⁄4" NPT,
single conduit
Y = NEMA 4X/7/9, 316 stainless steel,
3
⁄4" NPT,
single conduit
7 = NEMA 4X/7/9 Group B, aluminum die cast, 1" NPT
dual conduit
Mounting
0 = Integral
1 = Remote (connecting cable required)
Connecting Cable 3 7 0 - 00 -
Cable Type
A1 = RG178 for 1 set point, 1–50 ft.
B1 = RG58 for 1 set point, 51-300 ft.
Cable Length
Length of cable from remote electronics to
transducer in feet (300 feet max.)
MODEL IDENTIFICATION
Each unit has a nameplate on which the part number is
shown. The part number is coded to identify the configura-
tion of that specific unit. Listed below are the definitions of
each section of the part number, such that one can deter-
mine exactly which options the unit contains.
91S PART NUMBER CONSTRUCTION cont.
➀ Model 91S with output signal option code A1A or L1H available with
housing option codes F or 7 only.
➁ Model 91S with output signal option code T1W available with housing
option codes E or Y only.
➂ 316 SS Model 91S transducers have tip sensitive gaps as shown in
Figure 19 on page 17. Monel and Hastelloy C Model 91S transducers
have side gaps as shown in Figure 21 on page 18.
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