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SDS-97D Series
Sensor/Transmitters for a Wide Range of Toxic Gases, Hydrogen and Oxygen
Non-intrusive push button calibration
Excellent chemical selectivity
4-20 mA output, 24 Vdc loop powered
One-person calibration
Digital display
Electrochemical sensors
RFI/EMI resistant
Optional Precalibrated Sensor Exchange
SDS-97D Series Sensor/Transmitters utilize electrochemical type cells to detect the target gas. These cells consist of electrodes, electrolyte and an air/liquid separation barrier. Gas molecules enter the cell and, as a result of an oxidation/reduction reaction, generate an electrical current proportional to the gas concentration. This current is measured, conditioned, converted to the gas concentration, digitally displayed and transmitted as a 4-20 mA output signal. ENMET offers a variety of multi-channel controller/ alarm modules that provide the 24 Vdc loop power and receive the 4-20 mA signal from the sensor/transmitters. These sensor/transmitters can also be connected to various computer based instrumentation, PLCs, etc.
The use of a gas sampler generally improves monitoring performance for all gases. It is particularly recommended for Cl2, HCl, AsH3, and it is required for monitoring HF and O3.
The standard SDS-97D Sensor/Transmitters (P/N 10022-XXXX) incorporate an external push button for non-intrusive zeroing and gas calibration of the device. An optional version of the SDS-97D Sensor/Transmitters (P/N 10021-XXXX) feature a communication port and hand-held programming module (P/N 10021-001) which facilitate the elimination of the need for on-site gas calibration. Contact ENMET for details regarding the Precalibrated Sensor Exchange Program.
Specifications, SDS-97D
Size, approx:
4.75 w x 2.60 h x 1.85 d inches
(12 x 6.6 x 4.7 cm)
Weight:
1 lb. (454 g)
Enclosure:
Painted (polyurethane enamel) aluminum
Sensor:
Electrochemical cell, disposable, plug-in type
Display:
8 character, dot matrix LCD with backlight
Sensor Location from Controller:
Up to 2,000 feet (600 meters). Consult factory for greater distance.
Cable:
3-wire, shielded
Max. loop resistance: 300 ohms @ 24 Vdc
Typical installation wire: 20 AWG (0.5 mm2)
Voltage:
24 Vdc (10-30 Vdc), loop powered
Current Draw:
45 mA maximum
Output:
4-20 mA
Temperature Range:
-4° to 104° F (-20° to 40° C)
Humidity Range:
5 to 90% rH, non-condensing
Pressure Range:
Atmospheric ±10%
Gas Sampler Option
The use of a gas sampler generally improves monitoring performance for all gases. It is particularly recommended for Cl2, HCl, AsH3, and it is required for monitoring HF and O3.
Model GS-24-DF, P/N 04565-311 Gas Sampler, 24 Vdc with digital flow display. Shown here with SDS-97D Series Sensor/Transmitter.
Ordering Information
Gas (1)
Model
Range
LDL (4)
Controller Alarms, PPM (5)
Ammonia, NH3
SDS-2400-97D
100 ppm
6 ppm
25, 50, 75
Arsine, AsH3 (2)
SDS-4001-97D
0.50 ppm
0.04 ppm
0.05, 0.1, 0.4
Carbon monoxide, CO
SDS-1200-97D
500 ppm
4 ppm
35, 50, 200
Chlorine, Cl2 (2)
SDS-0100-97D
10.0 ppm
0.4 ppm
0.5, 1, 5
Ethylene oxide, ETO
SDS-5200-97D
10.0 ppm
1.2 ppm
3, 5, 9
Hydrogen, H2
SDS-1500-97D
2000 ppm
24 ppm
200, 500, 1000
Hydrogen chloride, HCl (2)
SDS-0400-97D
30.0 ppm
0.8 ppm
5, 10, 20
Hydrogen fluoride, HF (3)
SDS-0700-97D
10.0 ppm
0.8 ppm
3, 6, 9
Hydrogen sulfide, H2S
SDS-0200-97D
100 ppm
4 ppm
10, 20, 50
Nitric oxide, NO
SDS-1750-97D
100 ppm
4 ppm
25, 50, 75
Nitrogen dioxide, N02
SDS-1700-97D
30.0 ppm
1.2 ppm
3, 5, 10
Oxygen, 02
SDS-1100-97D
30.0%V
0.2%V
17, 19.5, 23.5%V
Ozone, 03 (3)
SDS-0800-97D
1.00 ppm
0.04 ppm
0.1, 0.5, 0.75
Silane, SiH4
SDS-4003-97D
30.0 ppm
3.2 ppm
5, 10, 20
Sulfur dioxide, SO2
SDS-0500-97D
30.0 ppm
0.8 ppm
2, 5, 10
(1) Consult ENMET for gases not on this list
(2) For best performance, it is recommended that a sample draw system be used for monitoring these gases
(3) Monitoring of these gases requires the use of a sample draw system
(4) Lower Detectable Limit calculated from baseline noise level, thermal drift and interference data used to derive zero point deviation estimates
(5) Standard factory alarm points for ENMET controllers when used with these SDS-97D Series Sensor/Transmitters.
