一、概述
                                 
                              SBWR热电偶温度变送器、SBWZ热电阻温度变送器是热电偶、热电阻系列仪表中的现场安装式温度变送单元。它采用二线传送方式（两根导线作为电源输入，信号输出的公用传输线）。将热电偶、热电阻信号变换成输入电信号或被测温度或成线性的4～20mA的输出信号，变送器可以安装于热电偶、热电阻的接线盒内与之形成一体化结构。它作为新一代测温仪表可广泛应用于冶金、石油化工、电力、轻工、纺织、食品、国防以及科研等工业部门。

                              二、温度变送器特点
                                  1、采用环氧树脂密封结构，因此抗震、耐温，适合在恶劣现场环境中安装使用。
                                 
                              2、现场安装于热电阻、热电偶的接线盒内，直接输出4～20mA，这样既省去较贵的补偿导线费用，又提高了信号长距离传送过程中的抗干扰能力。
                                  3、高、功耗低、使用环境温度范围宽、工作稳定可靠。
                                 
                              4、量程可调，并具有线性化较正功能，热电偶温度变送器具有冷端自动补偿功能。应用面广，既可与热电偶、热电阻形成一体化现场安装结构，也可作为功能模块安装入检测设备中。
                              
                              三、主要技术指标
                                  1、输入：热电阻Pt100、Cu50、Cu100
                                       热电偶K、E、S、B、T、J、N
                                 
                              2、输出：在量程范围内输出4～20mA直流信号可与热电阻温度计的输出电阻信号成线性，可与热电阻温度计的输入温度信号成线性；可与热电偶输入的毫伏信号成线性，也可与热电偶温度计的输入温度信号成线性。
                                  3、基本误差：0.1级，0.25级，0.5级
                                  4、传送方式：二线制
                                  5、变送器工作电源电压12V，35V，额定工作电压24V。
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                                  6、负载：极限负二载电阻按下式计算
                              RL（max）=50×（Vmm-12）
                              即24V时负载电阻可在0～600Ω范围内选用）额定负载250Ω。
                              注：量程可调式变送器，改变量程时零点与满度需反复调试；电偶型变送器在调试前须预热30分钟。
                                  7、环境温度影响≤0.05%1℃
                                  8、正常工作环境：
                                     a、环境温度 -25℃～+80℃
                                     b、相对湿度5%～95%
                                     c、机械振动f≤55Hz振幅＜0.15mm

                              四、型号、类别
                                型号
                                传感器分度号
                                量程规定
                                规定小值量程范围
                                （上限下限之差）

                                SBWR-2160
                                E
                                0～800℃
                                300℃

                                SBWR-2260
                                K
                                0～1300℃
                                400℃

                                SBWR-2360
                                S
                                0～1600℃
                                600℃

                                SBWR-2460
                                B
                                0～1800℃
                                800℃

                                SBWR-2560
                                T
                                0～400℃
                                200℃

                                SBWR-2660
                                J
                                0～1200℃
                                300℃

                                SBWR-2760
                                N
                                0～1200℃
                                400℃

                                SBWR-4160
                                E
                                0～800℃
                                300℃

                                SBWR-4260
                                K
                                0～1300℃
                                400℃

                                SBWR-4360
                                S
                                0～1600℃
                                600℃

                                SBWR-4460
                                B
                                0～1800℃
                                800℃

                                SBWR-4560
                                T
                                0～400℃
                                200℃

                                SBWR-4660
                                J
                                0～1200℃
                                300℃

                                SBWR-4760
                                N
                                0～1200
                                400℃

                                SBWZ-2160
                                Cu50
                                -50～150℃
                                50℃

                                SBWZ-2260
                                Cu100
                                -50～150℃
                                50℃

                                SBWZ-2460
                                Pt100
                                0～600℃
                                50℃

                                SBWZ-2460
                                Pt100
                                -100～200℃
                                50℃

                                SBWZ-4460
                                Pt100
                                -200～600℃
                                50℃