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MODEL 5081-T SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.2.3 TRANSMITTER SPECIFICATIONS @ 25°C
Measured Range*: 50 to 2,000,000 µS/cm (see chart)
Accuracy: ± 1.0% of reading
Repeatability: ± 0.25% of reading
Stability: 0.25% of output range/month,
non-cumulative
Ambient Temperature Coefficient: ± 0.2% of FS/°C
Temperature Slope Adjustment: 0-5%/° C
% Concentration Ranges:
Sodium Hydroxide: 0 to 15%
Hydrochloric Acid: 0 to 16%
Sulfuric Acid: 0 to 25% and 96 to 99.7%
1.2.4 LOOP SPECIFICATIONS
Loop Accuracy: With a standard Model 228 or 225 sen-
sor with 20' cable, laboratory accuracy at 25°C can be as
good as ±2% of reading and ± 50 µS/cm.
To achieve optimum performance, standardize the sen-
sor in the process at the conductivity and temperature of
interest.
Results under real process conditions, at different tem-
peratures, or using other sensors may differ from above.
RTD accuracy: Utilizing a perfect 100 Ohm RTD after 1
point temperature standardization, temperature reading
can be as good as ±0.5°C.
RECOMMENDED SENSORS:
Model 222 Flow-Through
Model 225 Clean-In-Place (CIP)
Model 226 Submersion/Insertion
Model 228 Submersion/Insertion/Retractable
Model 242* Flow-Through
*no I.S. approval for loops of 5081-T with 242-06 or 242-08
1.3 HAZARDOUS LOCATION APPROVAL
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4 Tamb = 70°C
Exia Entity
Class I, Groups A-D
Class II, Groups E-G
Class III
T4 Tamb = 70°C
ATEX 1180
II 1 G
Baseefa03ATEX0399
EEx ia IIC T4
Tamb = -20°C to +65°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4X Enclosure
Class I, Div. 2, Groups A-D
Suitable for
Class II, Div. 2, Groups E-G
T4 Tamb = 70°C
Explosion-Proof:
Class I, Div. 1, Groups B-D
Class II, Div. 1, Groups E-G
Class III, Div. 1
Class I, Groups B-D
Class II, Groups E-G
Class III
Tamb = 65°C max
3
RECOMMENDED RANGES FOR TOROIDAL SENSORS
Conductivity Sensor
Model Number 226 228 225 222 (1in.) 222 (2 in.) 242
Nominal Cell Constant 1.0 3.0 3.0 6.0 4.0 *
Minimum Conductivity (
µµ
S/cm) 50 200 200 500 500 100*
Maximum Conductivity (
µµ
S/cm) 1,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000*
* Model 242 values depend on sensor configuration and wiring.