TT: single/dual inputs (voltage, current, temperature), single/dual 4-20mA outputs or 4-20mA/RS-485 (Modbus).
Texmate TT Series Transmitters Product Brief

TL: Leopard class process control capability with 38 input signal conditioning options (AC, DC, frequency, process loop, load cell, potentiometer, temperature, pressure/load cell), one or two relay outputs for alarm/control applications, 420mA analog output, remote display/programmer. (UL Certification in process)
Texmate Leopard TL Series Transmitters Product Brief

TI: Tiger class microPLC capability with 140+ input signal conditioning options (TL inputs in single, dual, triple and quad options, LVDT, magnetorestrictive, single phase power), single/dual isolated analog outputs, up to 6 relay/SSR outputs, up to 16 digital I/O, USB / RS232 / RS485 / Ethernet communication in ASCII or Modbus, custom application software using TexBASIC structured text programming, PID (2 channels), linearization tables, totalizers, real time clock, data logging with Flash Card (UL Certification in process).

TL
TL
Series

TL-IA01
TL-IA01
AC-Volts Scaled RMS, 0-300V AC

TL-IA05
TL-IA05
AC 5 Amps Scaled RMS

TL-IA06
TL-IA06
AC-Volts True RMS, 0-300V AC

TL-IA11
TL-IA11
AC 5 Amps True RMS

TL-IP02
TL-IP02
4-20mA Isolator

TLF
TLF
Universal Frequency

TLF-IF08
TLF-IF08
Line Frequency

TLH
TLH
Temperature

TLRPM
TLRPM
Frequency / RPM