Series-FLT93L

In-line Flow Switch with FlexSwitch Technology for Extremely Low Flow Applications

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Perfect for extremely low liquid flow detection applications
In-line design with 0.05 to 15 cc/sec water setpoint range
Low flow thermal dispersion switch for precision process control
Accurate low-flow switching where standard flow switches cannot perform

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Series-FLT93L

From ^$ 2,125.00

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2 Variations available

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Data Sheet

Product Overview

Accuracy Detail •Temperature: ± 2 ºF [± 1 ºC]
Alarm Note Alarm Application for liquid flow services
Conduit Connection 1 in NPT Female Conduit with Cable
Control Output 2 Alarm
Enclosure Material Aluminum
Enclosure Material Note Polyester powder coated aluminum rated for NEMA Type 4X/IP67
Enclosure Ratings Hazardous Location Rated
Enclosure Ratings Note Agency approvals for hazardous location Groups B, C, D, E, F, G, and Eex d IIC
Identification Tag 316 Stainless Steel metal tag
Insertion Length 3.375 in
Operating Temperature, Max 140 °F
Operating Temperature, Min -40 °F
Output Signal Voltage
Measurement Pressure, Max 3500 psi
Pressure Note 3500 psig (241 bar (g)) at 70 F
Measurement Pressure Type Gauge
Process Connection Size 3/4 in
Process Connection Type NPT Male
Relay Output 6 A @ 115 Vac
Repeatability Note •Temperature: ± 1 ºF [± 0,6 ºC]
Response Time 1-2 seconds
Sensor Material 316L Stainless Steel
Sensor Temperature, Max 350 °F
Sensor Temperature, Min -40 °F
Series ID Series-FLT93L
Supply Voltage 120 to 230 Vac, 24 Vdc
Switch Type Inline Liquid Flow switch
Weight 8 lb

Supported Applications

The FLT93L FlexSwitch is an in-line thermal dispersion switch for monitoring flow, level, and temperature in industrial processes. Its in-line body is designed for extremely low flow applications, and because thermal dispersion sensing uses no moving parts, the switch reliably drives alarm or control outputs with little maintenance.

The device is a configurable sensor suitable for gas and liquid service in both hazardous and non-hazardous environments, supporting multiple alarm configurations, process connections, materials of construction, and electrical options so it can be matched to a specific line and medium.

Operating Conditions & Performance

The FLT93L covers a wide process temperature window, selectable as -40 to 177°C or, for higher-temperature service, -73 to 260°C.

Power: 115 Vac, 230 Vac, 24 Vdc, or 24 Vac.
Alarm output: SPDT or DPDT contacts.
Wetted materials: 316L stainless steel, Hastelloy C, Inconel 400, or Titanium grade 2 (S-Style only).
Local enclosure: aluminum or stainless steel, with cable entries of one 1" NPT, two 1/2" NPT, or two M20.

Process connections include 3/4" Female NPT, 1" Male NPT, 1 inch flanges, a DIN DN25 flange, and #PN40 316L stainless steel, with 150 lb and 300 lb carbon steel flange options. All enclosure styles carry agency approvals for hazardous locations covering Groups B, C, D, E, F, and G and Exd IIC.

Configuration Options

The FLT93L is ordered through a structured model number, so units differ across several independently selectable blocks:

Sensor element configuration: S-Style without orifice, S-Style with orifice, F-Style without orifice, or F-Style with orifice.
Process temperature: the -40 to 177°C or the -73 to 260°C range.
Material of construction: 316L stainless steel, Hastelloy C, Inconel 400, or Titanium grade 2.
Agency approval: Factory Mutual (FM), FM (T4 rated), ATEX with CE marking, FMc, or IEC (T4 rated).
Process connection and local enclosure: threaded, flanged, or DIN options paired with aluminum or stainless steel enclosures.

Key Product Differences

Configured part numbers begin with FLT93L followed by the block selections for agency approval, identification tag, process temperature, sensor element, material, process connection, enclosure, and alarm setup. The two catalogued configurations are: